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  • Author: Thierry Weissland x
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Heart Rate Variability before and after Knee Surgery in Amateur Soccer Players

Nicolas Olivier, Renaud Legrand, Jacques Rogez, FX Gamelin, Serge Berthoin, and Thierry Weissland

Objective:

To analyze the consequences on heart rate variability (HRV) of a hospitalization period due to surgery of the knee in sportsmen.

Patients:

Ten soccer players who had undergone knee surgery took part in this study.

Design:

HRV was measured before and after hospitalization within a 7-day interval.

Results:

After the hospitalization phase, heart rate at rest increased significantly (3 beats/minute). A significant decrease of 7% in the cardiac inter beat interval (R-R interval), P < 0.05 and a 66% decrease in total power spectral density: −66%, P < 0.05 were observed. The disturbance of the autonomic nervous system could be due to a variation in cardiac vagal activity resulting in a 64% decrease in the high frequencies (P < 0.05). This variation was not associated with a modification in normalized markers (LFn.u., HFn.u.) and LF/HF ratio (P > 0.05).

Conclusion:

In sportsmen, a hospitalization period led to an increase in resting heart rate and was associated with a disturbance of the autonomic nervous system.

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Effects of Powerchair Football: Contextual Factors That Impact Participation

Aurelien Vandenbergue, J.P. Barfield, Said Ahmaidi, Stephanie Williams, and Thierry Weissland

The aim of this study was to identify contextual factors that negatively affect activity and participation among powerchair football (PF) players. Thirty-seven semistructured interviews were conducted with PF players (M age = 27.9 ± 8.2 years) in France (n = 18) and the United States (n = 19). Participants reported acute back and neck pain as the primary morbidities resulting from PF participation, with sustained atypical posture in the sport chair as the primary cause. Competition-related physical and mental stress were also identified as participation outcomes. Accompanying the many benefits of PF, participants recognized negative impacts of discomfort, physical fatigue, and mental fatigue. Interventions such as seating modifications, thermotherapy to combat pain, napping to combat acute physical stress, and mental preparation to manage state anxiety were all identified as prospective interventions.