Research group Exercise physiology

Changing a sedentary lifestyle

A sedentary lifestyle is characterized by prolonged periods of uninterrupted sitting. There is increasing evidence that sitting time is strongly associated with an increased risk for cardio-metabolic diseases and mortality, independent from the volume of physical activity that is being performed. Hence, we aim to:

• Develop an intervention to reduce sitting time in daily life.
• Adopt the intervention to the specific needs of the patient population.
• Integrate the intervention in standard clinical care.
• Evaluate the effect of the intervention on disease progression and clinical outcomes.

Exercise is medicine

Exercise is a powerful strategy to reduce the risk for cardiovascular morbidity and mortality, and current guidelines recommend adults to perform at least 150 min/week of physical activity. We aim to identify:

• The minimal exercise dose which needed to induce any health benefits.
• The optimal exercise dose providing maximal health benefits.
• A potential upper threshold beyond which health benefits attenuate with increasing exercise volumes. 

Exercise performance in the heat

Performing exercise in hot and humid ambient conditions is known to induce hyperthermia, potentially leading to performance loss and/or the development of heat related illnesses. For this purpose we aim to:

• Identify personal and exercise related factors contributing to the development of exertional hyperthermia.
• Develop and validate novel measurement techniques to measure core body temperature non-invasively.
• Establish an athlete’s temperature profile to allow personalized interventions for reducing heat stress.
• Optimize cooling strategies prior to (pre-cooling) and during (per-cooling) exercise.
• Optimize acclimation and re-acclimation strategies.
• Collect data in field based settings during extreme exercise events.

Understanding cardiac stress and remodeling

Emerging evidence suggests that high volumes of lifelong high-intensity exercise training may not be as good for cardiovascular health as previously thought. We aim to unravel:

• The prevalence, predictors and clinical meaning of exercise-induced cardiac biomarker release.
• The underlying mechanisms and clinical relevance of accelerated coronary artery calcification among highly active amateur athletes.
• The impact of myocardial fibrosis on cardiac function and associated clinical outcomes.
• The prevalence of sudden death among athletes.
• The effects of an active lifestyle on longevity.

Adverse cardiac remodeling

We recently showed that high-volume high-intensity endurance exercise is related to accelerated coronary artery calcifications, a higher prevalence of myocardial fibrosis, troponin elevations in every athlete, and higher concentrations of dicarbonyl stress markers.

An overview of the of the potential deleterious effects of acute and chronic endurance exercise can be read here.

Cooling strategies for athletes

We found that exercise-induced exertional hyperthermia is a common phenomenon among athletes with 15% of runners participating in a 15 km road race demonstrating a core body temperature ≥40°C. Cooling before (pre-cooling) and during (per-cooling) exercise can attenuate the increase in core body temperature, whereas we showed that pre- and per-cooling interventions can boost exercise performance in the heat with +5.7% and +9.9%, respectively.
 
An overview of the effectiveness, physiological mechanisms, and practical considerations of cooling interventions can be read here.