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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Coris, Eric E. Mehra, Shabnam Walz, Stephen M. Duncanson, Robert Jennings, Jason Nugent, Dylan Zwygart, Kira Pescasio, Michele |
| Description | Country affiliation: United States Author Affiliation: Coris EE ( Department of Family Medicine, The University of South Florida College of Medicine, Tampa, FL 33612, USA. ecoris@health.usf.edu) |
| Abstract | CONTEXT: Exertional heat stroke is the third leading cause of death in US athletes. Elevations in core temperature in the digestive tract (TGI) have correlated with core temperature and are possible indicators of those at increased risk of heat stroke. OBJECTIVE: The primary objective was to compare a.m. vs. p.m. TGI variation in collegiate football linemen during intense 'two-a-day' preseason practice. A secondary objective was to compare longitudinal TGI in offensive and defensive linemen. DESIGN: Cross-sectional observational study. SETTING: Division I Intercollegiate Athletics Football Program. INTERVENTIONS: TGI was monitored during consecutive preseason sessions. MAIN OUTCOME MEASUREMENTS: TGI, heat illness, weight changes, environmental stress, and subjective symptoms. RESULTS: Mean TGI were 37.8°C and 38.3°C during a.m. and p.m. practices, respectively. The a.m. practices revealed higher TGI gain (1.8°C) compared to p.m. (1.4°C). The p.m. practices had higher maximum TGI than a.m. practices (39.1°C versus 38.8, P=0.0001). Mean time to maximum temperature (Tmax) was 1 hr and 30 min for a.m. and 1 hr and 22 min for p.m. practices. Offensive linemen trended toward higher mean TGI than defensive players (38.0°C vs. 36.7°C, P = 0.069). The rate of rise in TGI was significantly greater in a.m. practices. A decrease in rate of TGI rise was seen from the first to last a.m. practices of the week (P = 0.004). CONCLUSION: Significant TGI elevations in asymptomatic athletes are common in extreme heat during football practice. Intense a.m. practices in full gear result in higher net temperature gain and rate of temperature gain than p.m. practices. Offensive linemen trended toward higher TGI than defensive linemen. As players acclimatized, a decrease in the rate of TGI increase was appreciable, particularly in a.m. practices. Appreciating cumulative heat stress and variations in heat stress related to scheduling of practice is critical. |
| File Format | HTM / HTML |
| ISSN | 00384348 |
| Issue Number | 6 |
| Volume Number | 102 |
| e-ISSN | 15418243 |
| Journal | Southern Medical Journal |
| Language | English |
| Publisher | Lippincott Williams & Wilkins (for the Southern Medical Association) |
| Publisher Date | 2009-06-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Medicine Body Temperature Physiology Football Heat-shock Response Physical Exertion Body Temperature Regulation Cross-sectional Studies Gastrointestinal Tract Heat Stroke Prevention & Control Hot Temperature Adverse Effects Humans Male Physical Fitness Young Adult Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine |
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