Oliver Jan Quittmann

Deutsche Sporthochschule Köln | DSHS · Institut für Bewegungs- und Neurowissenschaft

Introduction Maximal fat oxidation (MFO) has implications for metabolic health [1] and explains between 12-14% of the variance in ultra-endurance events [2,3]. MFO seems to be influenced by training status, exercise intensity/duration, nutrition and sex [4]. Regarding the latter, there are still inconclusive findings on the influence of sex, that a...

Introduction Maximal fat oxidation (MFO) has implications for metabolic health [1] and explains between 12-14% of the variance in ultra-endurance events [2,3]. MFO seems to be influenced by training status, exercise intensity/duration, nutrition and sex [4]. Regarding the latter, there are still inconclusive findings on the influence of sex, that a...

Competitive cheerleading (cheersport) is growing in popularity every year and so is the level of performance. Although cheersport is a physically very demanding sport, there is little information about the physiological profile. Therefore, the purpose of this study was to examine heart rate (HR) throughout practice and simulated competition routine...

Thron, M, Woll, A, Doller, L, Quittmann, OJ, Härtel, S, Ruf, L, and Altmann, S. Physiological and locomotor profiling enables to differentiate between sprinters, 400-m runners, and middle-distance runners. J Strength Cond Res XX(X): 000–000, 2024—Different approaches exist for characterizing athletes, e.g., physiological and locomotor profiling. Th...

Purpose Isometric training and pre-activation are proven to enhance acceleration performance. However, traditional strength training exercises do not mirror the acceleration-specific activation patterns of the gluteal muscles, characterized by ipsilateral hip extension during contralateral hip flexion. Therefore, the aim of the study was to determi...

Introduction Because of drafting, cycling in short distance triathlon is characterized by variable power demands [1,2]. Performance analyses based on cycling split times may disregard that rid-ers in the same bike group experience different power demands. Factors such as position-ing within a bike group may therefore determine initial fatigue durin...

Einleitung Die maximale Laktatbildungsrate (ċLamax) wird immer häufiger im Rahmen von Leistungsdi- agnostiken eingesetzt, um die Leistungsfähigkeit des glykolytischen Stoffwechsels abzu- schätzen, was für verschiedene Ausdauerdisziplinen von Bedeutung sein könnte. Methode Im Rahmen zweier Studien hat unsere Arbeitsgruppe die Reliabilität und Spezif...

Einleitung Die maximale Laktatbildungsrate (ċLamax) wird immer häufiger im Rahmen von Leistungsdi- agnostiken eingesetzt, um die Leistungsfähigkeit des glykolytischen Stoffwechsels abzu- schätzen, was für verschiedene Ausdauerdisziplinen von Bedeutung sein könnte. Methode Im Rahmen zweier Studien hat unsere Arbeitsgruppe die Reliabilität und Spezif...

Background: Gas exchange data from maximum oxygen uptake ([Formula: see text]) testing typically require post-processing. Different processing strategies may lead to varying [Formula: see text] values affecting their interpretation. However, the exact processing strategies used in the literature have yet to be systematically investigated. Previous...

Introduction The ability to sustain a high metabolic rate for an extended period of time is essential for endurance performance and reflects the interplay between the aerobic and anaerobic metabolism [1]. The most frequently used parameters in that regard are the onset of blood lactate accumulation (OBLA), maximal lactate steady-state (MLSS) and cr...

Introduction The ability to sustain a high metabolic rate for an extended period of time is essential for endurance performance and reflects the interplay between the aerobic and anaerobic metabolism [1]. The most frequently used parameters in that regard are the onset of blood lactate accumulation (OBLA), maximal lactate steady-state (MLSS) and cr...

Endurance running performance can be predicted by maximal oxygen uptake (V̇O2max), the fractional utilisation of oxygen uptake (%V̇O2max) and running economy at lactate threshold (REOBLA). This study aims to assess maximal lactate accumulation rate (ċLamax) in terms of improving running performance prediction in trained athletes. Forty-four competi...

Introduction High-Intensity Interval training (HIIT) was highlighted as a safe intervention that allows for multiple health benefits across the lifespan [1]. Previous research indicated variables for characterizing HIIT protocols and categorized four types of HIIT: long intervals (LI, > 60 s), short intervals (SI, ≤ 60 s), repeated sprint training...

High-Intensity Interval training (HIIT) was highlighted as a safe intervention that allows for multiple health benefits across the lifespan. Previous research indicated variables for characterizing HIIT protocols and categorized four types of HIIT: long intervals (LI, > 60 s), short intervals (SI, ≤ 60 s), repeated sprint training (RST) and sprint...

INTRODUCTION: Middle distance running is unique due to its proximity to sprint running. Athletes competing over these distance display various physiological profiles [1]. Due to increasing anaerobic energy supply and altered muscular demands of high velocity running, differences become more pronounced with distances bordering sprint events [2]. Pre...

Background: Concurrent strength and endurance training could interfere with adaptation, which primarily affects long-term strength development. However, so far, research on this theme has rarely focused on ways to optimize concurrent strength and endurance training in team sports. Objectives: This paper aims to summarize the literature on the effec...

Introduction: Paratriathlon allows competition for athletes with various physical impairments. The wheelchair category stands out from other paratriathlon categories, since competing in swimming, handcycling and wheelchair racing entails substantial demands on the upper-extremity. Hence, knowledge about exercise testing and training is needed to im...

Purpose: Measuring the blood lactate concentration allows for a glimpse at the metabolic processes during exercise. To extract characteristics of metabolism the relationship between blood lactate concentration and power or velocity is modeled. Current modeling approaches allow only limited interpretation, are in conflict with basic principles of sc...

The aim of this narrative review is to provide insight as to the history, biomechanics, and physiological characteristics of competitive handcycling. Furthermore, based upon the limited evidence available, this paper aims to provide practical training suggestions by which to develop competitive handcycling performance. Handbike configuration, indiv...

Purpose: A mathematical model to describe the interplay of distinct metabolic rates during exercise was developed decades ago. Despite its use in endurance performance diagnostics, attempts to validate the model's assumptions and predictions on experimental data are rare. We here provide a comprehensive study for the steady state. Methods: We rewro...

This study aims to compare maximal lactate accumulation rate (V̇Lamax) and power output (Pmax) between cycling and running in terms of reliability, differences between and correlations among modalities. Eighteen competitive triathletes performed a 15-s all-out exercise test in cycling and a 100-m sprint test in running. Each test was performed twic...

Purpose This study aims to investigate the biomechanics of handcycling during a continuous load trial (CLT) to assess the mechanisms underlying fatigue in upper body exercise. Methods Twelve able-bodied triathletes performed a 30-min CLT at a power output corresponding to lactate threshold in a racing recumbent handcycle mounted on a stationary erg...

The aim of this study was to assess lactate kinetics, maximal lactate accumulation rate (V˙Lamax) and peak power output (POmax) in a 15-s all-out exercise in handcycling (HC) and cycling (C) in terms of (1) reliability, (2) differences and (3) correlations between HC and C. Eighteen female and male competitive triathletes performed two trials (sepa...

This study aims to quantify the kinematics, kinetics and muscular activity of all-out handcycling exercise and examine their alterations during the course of a 15-s sprint test. Twelve able-bodied competitive triathletes performed a 15-s all-out sprint test in a recumbent racing handcycle that was attached to an ergometer. During the sprint test, t...

The purpose of this study was to examine the effects of detraining following a block (BLOCK) or daily undulating periodized (DUP) resistance training (RT) on hypertrophy, strength, and athletic performance in adolescent athletes. Twenty-one males (age = 16 ± 0.7 years; range 15-18 years) were randomly assigned to one of two 12-week intervention gro...

Introduction: Unilateral (UNI) as well as bilateral (BI) exercises are commonly used in strength programs for youth athletes. However, studies comparing the effects of UNI vs. BI in youths are lacking. Methods: Twenty-seven healthy male soccer players, aged between 14 and 16, were recruited for this study. A two-group (BI and UNI) randomized matc...

Muscular activity in terms of surface electromyography (sEMG) is usually normalised to maximal voluntary isometric contractions (MVICs). This study aims to compare two different MVIC-modes in handcycling and examine the effect of moving average window-size. Twelve able-bodied male competitive triathletes performed ten MVICs against manual resistanc...

Handcycling is an efficient and aerobically demanding exercise for improving endurance in individuals with an spinal cord injury (SCI) or amputation of the lower limb/s. Even though handcycling was found to be mechanically less straining when compared to manual wheelchair propulsion, Paralympic athletes are prone to overuse injuries of the upper ex...

Background Endurance capacity is one of the main performance determinants in handcycling. There are two exercise test procedures primarily applied to determine endurance capacity, to verify training adaptations and predict race performance. This study aims to evaluate the agreement of these applied concepts in handcycling. Methods In a repeated me...

Objectives The aim of this study was to examine the reliability of maximal lactate accumulation rate (V̇Lamax) and sprint performance parameters in running and assess different approaches to determine alactic time interval (talac). Design Sixteen competitive runners (female = 5; male = 11) performed three trials (T1, T2 and T3) of an all-out 100-m...

The aim of this study was to assess muscle activity patterns (MAPs) in handcycling in terms of reliability and their alterations due to increasing workload. A total of 12 able-bodied triathletes performed an incremental step test until subjective exhaustion in a racing hand-cycle that was mounted on an ergometer. During the test, muscular activity...

Purpose: Muscle mass, strength, and power are important factors for performance. To improve these characteristics, periodized resistance training is used. However, there is no consensus regarding the most effective periodization model. Therefore, the purpose of this study was to compare the effects of block (BLOCK) vs daily undulating periodization...

The aim of this study was to examine the biomechanics of handcycling during the course of a 15-s all-out sprint test in able-bodied participants. Twelve able-bodied competitive triathletes performed a 15-s all-out sprint test in a recumbent racing handcycle that was attached to an ergometer. During the sprint test, tangential crank kinetics, 3D joi...

Wheelchair athletes make vigorous of their upper extremities during daily living and exercise and demonstrate a high prevalence of overuse injuries in the shoulder, wrist and elbow region. In order to improve handcycling performance and indicate possible risks for overuse, we examined the kinematics, kinetics and muscular activity of a 15-s all-out...

The poster describes the joint kinematics and muscular activity of a 15-s all-out exercise test in handcycling.

Purpose: The aim of this study was to expand exercise testing in handcycling by (1) examining different approaches to determine lactate kinetics in handcycling under various exercise modalities and (2) identifying relationships between parameters of lactate kinetics and selected performance measures. Methods: Twelve able-bodied nationally compet...

In the original article, the surname of the second author is published incorrectly. The correct author name should be “Joshua Meskemper”.

In Paralympic sports, biomechanical optimisation of movements and equipment seems to be promising for improving performance. In handcycling, information about the biomechanics of this sport is mainly provided by case studies. The aim of the current study was (1) to examine changes in handcycling propulsion kinematics and kinetics due to increasing...

Introduction Incremental step tests and sprint tests with lactate measurements are commonly used in handcycling diagnostics. However, it is still unclear if the physiological parameters elucidate the athlete’s performance characteristics. Therefore, the aim of this study was to analyze the relationship between physiological and performance measures...

The aim of this study was to examine changes in handcycling propulsion kinematics and kinetics due to increasing workloads. Twelve non-disabled male triathletes without handcycling experience performed a familiarisation protocol and an incremental step test in a recumbent racing handcycle that was attached to an ergometer. During the incremental te...

Introduction The sport of people with disabilities has gained increased attention, recognition and acceptance in media and society. The process of professionalisation can be seen in the development of attendance, performance, and scientific exami-nations. Because of the highly individual properties, a huge potential for the paralympic sport is lyi...

Einleitung / Problemstellung: Die extrakorporale Stoßwellenbehandlung wird bei unterschiedlichen Erkrankungen und zur Regeneration verschiedener Gewebe eingesetzt. So zeigten sich bei Nierensteinen, Osteoarthritis, erektiler Dysfunktion und Verletzungen des Bewegungsapparates positive Ergebnisse, deren Ursachen bisher nur unzureichend geklärt sind....