Low vigorous physical activity is associated with increased adrenocortical reactivity to psychosocial stress in students with high stress perceptions.
OBJECTIVE
The pathways by which physical activity impacts on participants' health are still not fully understood. The purpose of the present study was to go beyond existing research by combining methods from survey-based and experimental stress research, and by examining whether the potential of vigorous physical activity (VPA) to attenuate physiological and psychological stress responses is moderated by participants' subjective stress perception.


METHODS
The sample consisted of 42 undergraduate students (M=21.2±2.2 years, 52% women). Participants self-reported their stress and wore an accelerometer device for seven consecutive days. To examine differences in the adrenocortical, autonomic and psychological stress reactivity, salivary free cortisol, heart rate, state anxiety, mood and calmness were assessed prior to, during and after the Trier Social Stress Test (TSST). The cut-offs of the American College of Sports Medicine (ACSM) were used to distinguish between students below/above current VPA recommendations.


RESULTS
High levels of perceived stress combined with VPA levels below the ACSM's standards (<3×20min/week) were associated with an increased salivary cortisol response to the TSST (p<.05). No significant group differences existed for heart rate. However, students with high stress/low VPA experienced less favourable affect throughout the entire testing session (p<.05).


CONCLUSIONS
Our study suggests that VPA has a high stress-protective potential among undergraduate students with high stress levels. Our findings highlight that promoting VPA in young adults seems to be a promising strategy to increase physiological and psychological stress resilience.
Department of Sport, Exercise and Health, Sport Science Section, University of Basel, Basel, Switzerland. Electronic address: markus.gerber@unibas.ch.
Markus
M
Gerber
Department of Sport, Exercise and Health, Sport Science Section, University of Basel, Basel, Switzerland.
Sebastian
S
Ludyga
Department of Sport, Exercise and Health, Sport Science Section, University of Basel, Basel, Switzerland.
Manuel
M
Mücke
Department of Sport, Exercise and Health, Sport Science Section, University of Basel, Basel, Switzerland.
Flora
F
Colledge
Department of Sport, Exercise and Health, Sport Science Section, University of Basel, Basel, Switzerland; Center for Affective, Stress and Sleep Disorders, Psychiatric Clinics of the University of Basel, Basel, Switzerland.
Serge
S
Brand
Department of Sport, Exercise and Health, Sport Science Section, University of Basel, Basel, Switzerland.
Uwe
U
Pühse
D000339:Affect / Q000502:physiology*; D001007:Anxiety / Q000378:metabolism / Q000517:prevention & control / Q000523:psychology; D001341:Autonomic Nervous System / Q000378:metabolism; D015444:Exercise / Q000502:physiology / Q000523:psychology*; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D006854:Hydrocortisone / Q000378:metabolism; D008297:Male; D010465:Perception / Q000502:physiology; D012463:Saliva; D013315:Stress, Psychological / Q000378:metabolism* / Q000517:prevention & control; D013334:Students; D055815:Young Adult
D006854:Hydrocortisone
Accelerometry; Affect; Heart rate; Response; Salivary cortisol; Stress; Trier social stress test (TSST); Vigorous physical activity