Questions related to Exercise Performance
My research group is currently investigating the effects of active time on maximal exercise performance. We have 7 subjects that did both the intervention and control test. This meant they had 1 test day with more active time (woke up at 6.00 and did a max test at 16.00) and one with less active time (woke up at 10.00 and did a max test at 16.00). To measure performance, we did a treadmill exercise and measured heart rates at base (before test) , during warm up, during phase 1, phase 2, 3, and 4 and their heart rates right before complete exhaustion was achieved.
Meaning: we have 2 sets of data per subject (early/late) with 7 different measures of Heart rate. My question is: Which statistical test is best suited for this type of data?
We want to know if active time has had an effect on any or all of the heart rate variables measured. I've tried doing a paired t -test for each measurement phase but with certain phases, the heart rates remain constant over the final 10 secs of BPM (The last 10 seconds BPM was gathered as the values for heart rate of each phase. With some of the later phases, these 10 values are the same amount of BPM). Because of this, when doing a paired t -test of e.g. participant 1 phase 4, SPSS cannot compute a t-test table because the means have no standard deviation or standard error of difference.
How do I go about comparing the measurement between these final phases. Is a repeated measures Anova the option to go for? Is there a different test for this type of data?
I would like to know whether there is any comparison of the ATP levels pre, during, and after exercise of different methods, intensity and duration.
Is there any research about the kinetics of ATP?
Also, what is considered as the gold-standard for measuring ATP?
Does Venous or Capillary testing more appropriate and what are the limitations?
Would love to read anything available.
Food matrix refer to other components in the food that could synergic effect with macronutrient or micronutrient in food. One review had shown that whole milk had more effect than low fat milk or iso-milk protein for muscle protein synthesis regardless of reach to leucine threshold after exercise. This effect was without reaching to leucine threshold, due to exist of food matrix in whole milk. So I would like to plan this discuss about coffee component. The one of component in coffee that very application in exercise is caffeine and many research discussed about of different dose of caffeine for effectiveness during exercise. But many researches used the caffeine individually and in form of supplement (for example: pills, gum, and etc). Now I want to express this issue, does all of coffee component with together had more synergic effect than individually form of each component? Does synergic effect of coffee component more important than quantities of each components in individually form? For example maybe food matrix of coffee for effectiveness of caffeine more important than dose of caffeine? What’s your idea about food matrix for exercise performance?
Could you help me please. I have conducted a randomised study on 2 supplement that are double blinded on 8 participants and I am trying to find their effect on exercise performance. I have collected the data from all the participants. (which SPSS test is most suitable for this study and which test retest) please advice. Many thanks in advance
heat acclimatization can increase performance of athlete and occupational for physical activity in heat condition.
for this purpose we have to train for adaptation in heat condition regularly. but I have some question about chronic heat stress.
does living in heat climate can lead to chronic fatigue?
does hyperthermia and heat illness occur without any symptom chronically?
It is known that the insulin level drops during sports in healthy people, despite a much higher glucose demand of skeletal muscles. Is this important for glucagon regulation and fat burn? How would a high continuing glucose ingestion during activity influence performance and fat burn utilisation?
I intend to use the Psychological Characteristics of Developing Excellence Questionnaire (PCDEQ), developed and validated by MacNamara & Collins (2011, 2013), in a study in Portugal. In order to apply the questionnaire I tried to find one already translated to Portuguese or Spanish, but I didn't find available. If anyone have that document, please send me.
Thanks in advance.
I'm doing a study on the acute effect of 3 pilates based exercises on dynamic balance and motor performance of limbs in healthy young adults. The hypothesis is that working central stability will make possible an increase in the limits of stability and motor performance. For this population and exercise, which would be the best tests for motor performance/bahavior of the upper and lower limbs?
I want to know the suitable recovery duration when I use the interval training method for improving the speed or special endurance abilities which depend on anaerobic system of energy?
Various studies have shown that intensified training results in reduced EMG activity performing a standard assessment. But why is that so at the same power output? If cycling @ 200W then EMG activity is lowered in VL for example in an overreached scenario.
I’m pretty familiar with CrossFit, having once been a Level 2 CrossFit trainer and CrossFit Kids trainer but no longer associated with CrossFit, so I’m quite interested in your project. I read the two articles derived from that data collected during the “CrossFit Teens randomized control trial” and have a few questions. This is the first.
Thanks so much for your time.
Good day all ,
Has anyone conducted or does anyone know of any studies that have validated popular wearable technologies such as jawbone,fitbit etc against PSG (Kripke method) or any method. In particular for performance or industrial settings.
Does anybody know a method to repeatedly quantify the force produced during an isometric barbell squat as well as an isometric bench press? Since the subjects' force production will be measured at least 5 times in roughly 75 minutes it is impossible to conduct a 1RM - test each time. I was thinking about a Kistler plate / multi - press setup in regard to the squat but I am clueless concerning the bench press. Is there a more elegant, uncomplicated way (integrated force sensors maybe) to achieve this?
Thanks for suggestions in advance!
I am looking to purchase a reliable heart rate monitor for research use. Despite the obvious quality of Polar HR equipment (I used Polar team in my previous institution), the majority of the new monitors appear only to have software for use on a mobile phone (e.g. Polar H7). I am concerned about the limitation of this software to allow detailed analysis of the data collected.
I would be keen to hear opinions on good (i.e. valid, reliable) heart rate monitors that connect to software that allows detailed analysis of a session (i.e. mean HR, peak HR, analysis of HR within different time periods).
I have already had a trawl around Research Gate and seen some interesting information, but these mainly relate to HR monitors for specific HRV measurements. I would be using the device to record HR during short and long duration exercise tests (i.e. max tests, performance tests).
I am trying to determine which portable lactate monitor is the best to use for research. Since it will be used in exercise testing, it needs to be accurate and reliable at both low (<5 mmol/L) and high (>10 mmol/L) concentrations.
There are many on the market with several papers detailing supposed reliability so it is not the most straight forward decision.
Any information or recommendations would be greatly appreciated.
I am interested in analyzing the rehab exercise data (say from cycling exercise regime for 3-6 months) and correlate it with recovery assessment scores (FIM / NIHSS or modified Rankin Scale) for a stroke patient.
- Does anyone know of such work?
- Is there any dataset available with exercise regime and recovery assessment scores?
- Which systems (central nervous, hormonal, muscular, ...) need to be measured?
- Which monitoring tools are useful for which system?
- Which interventions are useful to regenerate which system?
- Which interventions are no-gos in case of overload of each system?
I'm trying to find some test to asses knee stability different to Star Excursion Balance Test. I'm interested in any test which can be proved with athletes who have been undergone to a ACL operation and can be performed at field.
Thanks so much
Could cerebral hipercapnia with normoxia serve as the trigger for epileptic seizure in maximal voluntary breath hold in epileptic freedivers? If not, are you aware of any known physiological associates that would increase risk of getting epileptic attack during static and dynamic breath hold? Due to diving reflex there is hipercapnia with hypoxia present in the entire body except brain where there is hypercapnia with normoxia.
Aerobic capacity of an individual differs from person to person. An endurance runner who performed TMT (Age: 39 yrs; 4th stage of Bruce Protocol for 12:00 min:s; 13.30 METS, HR rest = 54 bpm; rose to a HR max = 171 bpm which is 94 % of the maximal age predicted heart rate), but the test was stopped due to safety of the athletes. How do we calculate his maximal aerobic capacity from sub-maximal exercise?
I want to see the effect of a balance training intervention on dynamic balance control in DCD children. so this is important for me that I could see changes of dynamic balance through training.
What protocols do you recommended for this? Dose walking (gate) on force plate is a suitable for analysis of dynamic balance or not?
I just want to have an idea how this centers are structure, and what is the conception of athlete life and career that support this kind of facility. What is the scientic literature that supports the conception of Sports Performance Centers?
How much water are we able to absorb in given amount of time in rest or during exercise? I have came across different values and can't really figure out what is to be advised to ultra endurance athletes performing in the heat, as accumulation of unabsorbed fluid can cause gastrointestinal problems ...
A pilot study in my university, we are searching information about muscular strength in a multiforce for leg extension.
I wanna know more about this and your opinions
I've had some difficulty to conduct such assessments in teenagers. If somebody has tips, it will be valuable. Thanks.
In Karvonen formula (Target HR zone=((max HR - resting HR) * %intensity) + resting HR example)
I need to know how to measure and define the %intensity which is equivalent to the exorcise intensity!
Also I need to know the unit of measurement.
Thanks a lot
To clarify these aspects I suggest two papers to read:
Optimizing the "priming" effect: influence of prior exercise intensity and recovery duration on O2 uptake kinetics and severe-intensity exercise tolerance.
J Appl Physiol (1985). 2009 Dec;107(6):1743-56.
Effects of priming exercise on VO2 kinetics and the power-duration relationship.
Med Sci Sports Exerc. 2011 Nov;43(11):2171-9.
If I have allometrically scaled (body mass) data from a performance test is it possible to use the scaling component to track changes longitundinally?
If I scaled data from a baseline measure (fitness test) from a full squad/cohort of players, and want to assess a number of specific players longitudinally (across a season) do I still use the original scaling component from baseline to assess changes?
For example if a player has a large increase in body mass across a season but maintains performance of a fitness test, does the original scaling component apply as I am assessing the individual against themselves?
I'm assessing the effect of fluid on exercise performance. In order to do that I am measuring intestinal temperature at several time points,and time to exhaustion. I am using a repeated measures design, once with fluid ingestion and once without.
Currently, I performed an ANOVA on the temperatures and a ttest on the time to exhaustion, however one showed a significant difference where as the other did not.
Is this the right test for my design?
If so, how do I accept or reject either hypothesis?
Will be happy to know about the performance analysis (the areas to be looked into) in archery and Shooting to improve performance. Have planned for a 2D video analysis (3 Cameras, aerial, Lateral and posterior) and force distribution Center of Pressure (COP) between the foot using AMTI Force plates. However, need more literature support on this and any possibilities of incorporating 3D Mocap technology and any other additional available technology to this?
Available normative data and any further guidance will be of great support.
Thanks in Advance.
I am curious about these mask,
Seeing them more and more, I began to wonder if there is any benefit to actually wearing these? I would love to know what the scientific community thinks, but am having a hard time actually finding papers regarding such things.
Any input would be nice.
I am looking to produce a dissertation study based on the effects of plyometric training on sand to see if it can be used as an additional training program in footballers seasons to increase power output, agility, vertical jump height and speed. Whilst have minimal effect on muscle soreness and fatigue.
I am using likert scales to quantify perceptual changes in junior athletes.
For all of my nominal data, I have been comparing changes using magnitude-based-inferences based off the standardised smallest worthwhile change (0.2 x between athletes SD). I have also been looking at SWC as a percentage from this data which is easy to calculate from the raw SD. However, I was wondering if there is there an appropriate way of calculating the SWC as a percentage for ordinal data? Is this appropriate?
For calculating magnitude-based-inferences, it is possible to rank transform ordinal data using Hopkin's spreadsheets and look at standardised effects from this. To calculate the SWC, is it appropriate to use the the rank transformed mean and SD or from the back transformed mean and SD? Both yield very different SWC's.
Any help would be greatly appreciated
I would like to know anything about mechanism of hypoxic training especially 'live low - train high' method on anaerobic performance improvement. How about pathway of this mechanism?
Remedial Program Biomechanical corrections for the illegal bowling action (Chucking), any research or evidence based support is appreciated.
I am looking for normative data of the joint angles during rowing action (Sculling) using Concept 2 and Vicon nexus system. Any evidences will be appreciated. Please do suggest me previous studies. Many thanks.
I am researching how elevated expectations can affect performance in a repetitive golf putting task and want to measure how and if it has any derogatory effects on efficacy.
I'm in search of a commonly-used graded exercise test for an upper-body ergometer that determines maximal oxygen consumption.
There are many high caliber athletes with the exact same training program and passion as an Olympian, but fail to make the cut. Is there something in an Olympian's DNA (build, genetics, mental state, etc.) that make them a cut above the rest? If you ask an Olympian, they may say, "I work really hard and I love the game." But, lots of people work hard and love the game. Is natural ability and build a big part of being a successful athlete? I'm looking for a researcher who may know about this topic and would be willing to answer some of my questions.
When we perform a collection of data obtained from gas analysis in hypoxia, do we need to conduct some special adaptations in the gas analysers? What is the best gas analyser to do this kind of evaluation? And finally, must we do some treatment in the data obtained, because the analyzers are setting to read in a FiO2 in normabaric enviroment?
I'm looking for other options in the absence of a metabolic cart for submaximal VO2 testing. There's one method I've found (http://www.brianmac.co.uk/treadmill.htm) but I question it's validity/practicality. Has anyone done similar tests without a true exercise lab?
How to pressure, when, how many times during the start and after the first 30-40m? How to breath, how many times etc. during the mentioned section?
Still in the early stages of research but plan on looking at the effects of consuming various amounts of CHO, and fasted state prior to HIIT, examining power output pre and post exercise intervention along with metabolic changes that occur. Sample will be based around female university athletes
Aim is to try and find an appropriate recommendation of pre HIIT CHO consumption that will allow increased performance e.g. power output and induce metabolic changes.
Any contributions or critiques are more than welcome
I am looking at test-retest reliability of gait measures. However, within each test, the same gait exercises are performed twice to look for learning effects. We found systematic better outcomes the second time the exercise was performed within each test compared to the first time, both in test 1 and in test 2. Does anyone know which attempt is adviced to look at when you now want to look at reliability between the 2 tests? Do you take the best attempt (to account for learning effects), or do you average the different attempts (to have a measure of original performance and learning effect)?
Can changes in urine leukocytes, pH, proteins etc., content obtained from a urine stick sample of the first morning urination provide a measure of physiological immune function and/or inflammation or would this only provide an indication of renal function? For example, athletes under high training stress can demonstrate significant increases in leukocytes in blood, but would this be reflected in urine if renal function was normal? Thanks for any thoughts - evidence based answers are preferred so please feel free to suggest any relevant publications. I notice that work from Mike Gleeson suggests blood markers should be used to monitor immune function.
I am using an exercise diary to evaluate the effectiveness of my intervention. Now, I am looking for information on how valid this method is, and on how I can check validity of the information given. We know that people cheat (positively to please the researcher) or negatively (they might forget to fill up the diary). I would be glad to receive some references as well.
I have seen the 400 and 700 series probes from YSI, but only the skin and rectal thermistors. I haven't been able to get much information about the readout unit for those thermistors. Plus, a wireless system would be more ideal, if I can get it for less then $6000-$7000 or so. Anyone who can provide insight and personal experience with various systems would be much appreciated.
Start. Speed up phase. Coordination phase. "Resting phase". Curve phase. How to run the curve "exit", the straight section. How and when can be reserved the runner? Etc..
In November, I will defend my doctoral thesis entitled "nutritional analysis and its relation with psycho-physical stress and muscle damage in professional players of volleyball throughout a season". Besides I finished in 2011 the master degree in nutrition and health at Basque County University (Spain) and I'm also finished a Master in Kinanthropometry and Sports Nutrition at the University of Valencia (Spain).
I would like to know a research group in nutrition and/or sport physiology for a post-doctorate in this area.
Is there any difference in effectiveness between these forms in the case of starting to a sound sign (race or training) or starting independently (training)?
Is there any reason for the existence the 0.1sec rule? (The sprinter have to disqualify if the block sensor measured lower value than 0.1s reaction time.) Colin Jackson once said that he could break this time. Is it possible?
Allometric scale is usually used for VO2max data normalization. What about anaerobic power (peak power)? Any references or experiences? What is your opinion?
In 2006, a complete warm-up programme called the “11+” was created by F-MARC (Medical Assessment and Research Centre) with the support of FIFA (Fédération Internationale de Football Association) in order to reduce the risk of injury among football players and provide an injury-prevention model for other sports authorities.
We are planning to conduct a study where we are searching for effective and low cost rehabilitation intervention for patients with CLBP and long-lasting neck pain referred to physiotherapy. At the same time we wish to see if it is possible to find some good and easy ways to measure strength in the upper body strength without the need for much equipment.
I'm trying to track down sources of information that offer some values of acceptable variations in oxygen consumption, particularly the on-kinetics. Does anyone have or know of any peer reviewed material?
I read the abstract of the article attached to this message. Interesting findings and an eye opener for everybody involved in talent ID.
However, I have some additional questions related to the observations reported:
1. How long underperformed the athlete during their development. Was this for only 1 season or multiple seasons?
2. Was the temporary decrease in performance related to the shift in competition category? Eg from junior level to U23 level, or U23 to elite level? Any other possible explanations for the observations? eg coaching quality?
Shin pain is experienced by most of the runners. How to reduce the pain without giving complete rest from practice? Are there any alternatives?
I'm involved in a multi-venue project that is working with young (11 years +) overweight/obese children/adolescents. I'm after a quick and easy field test that requires minimal resources that can monitor changes over time. I was thinking of the Rockport walk test but in all honesty, I think a mile is going to be too long time wise and potentially too difficult for some of the participants. Any help/advice would be most appreciated. Thanks
Currently looking at high level footballers who are going through, or about to experience a career transition within their sport. I am wanting to see what suggestions others have regarding interventions to ease these transitions.
In recent times, Australian media reports have provided us with coverage of several high-profile AFL clubs undertaking training camps at altitude in an attempt to gain a competitive advantage over their rivals. The majority of the current research investigating the potential benefits of altitude training on sea-level performance has been conducted on endurance athletes with limited research involving team sport athletes and performance measures that related to the physiological demands of team-sport match play. Furthermore, the weight of evidence suggests that altitude training may only provide modest (1-2%) superior benefits, compared to training at sea-level, which are highly individualized and may not be highly repeatable.
However, the ability of an overseas travel and training camp to build group camaraderie, establish close relationships and unite a team, are factors that go largely unmeasured and may be "more important" to team sport success than a potential 1-2% improvement in physiological variables or performance measures. I would be interested in the opinions of fellow sport scientists on the validity of altitude camps for team sports.
Close chain exercise is a type of isotonic one, where the end of the chain is fixed or, in other explanation, the proximal part of the segment moves to the distal one. For open chain exercise it is evident that the end of the chain is not fixed or, for the other comment, the distal part of the segment moves to the proximal.
According to these definitions there ares conflict existing for identifying leg press sort of exercise.
Although I myself found in literature that leg press is classifyed in both forms of exercise.
I need something more (body type) specific calculation table or/and calculations with more body segments.