PMID- 29210954
OWN - NLM
STAT- MEDLINE
DCOM- 20190110
LR  - 20190110
IS  - 1533-4287 (Electronic)
IS  - 1064-8011 (Linking)
VI  - 32
IP  - 10
DP  - 2018 Oct
TI  - Examining the Influence of Exercise Intensity and Hydration on Gastrointestinal 
      Temperature in Collegiate Football Players.
PG  - 2888-2896
LID - 10.1519/JSC.0000000000002137 [doi]
AB  - DeMartini-Nolan, JK, Martschinske, JL, Casa, DJ, Lopez, RM, Stearns, RL, Ganio, 
      MS, and Coris, E. Examining the influence of exercise intensity and hydration on 
      gastrointestinal temperature in collegiate football players. J Strength Cond Res 
      32(10): 2888-2896, 2018-Debate exists regarding the influence of intensity and 
      hydration on body temperature during American football. The purpose of this study 
      was to observe body core temperature responses with changes in intensity and 
      hydration. Twenty-nine male football players (age = 21 +/- 1 year, height = 187 +/- 9 
      cm, mass = 110.1 +/- 23.5 kg, body mass index [BMI] = 31.3 +/- 5.0, and body surface 
      area [BSA] = 2.34 +/- 0.27 m) participated in 8 days of practice in a warm 
      environment (wet bulb globe temperature: 29.6 +/- 1.6 degrees  C). Participants were 
      identified as starters (S; n = 12) or nonstarters (n = 17) and linemen (L; n = 
      14) or nonlinemen (NL; n = 15). Variables of interest included core body 
      temperature (T), hydration status, and physical performance characteristics as 
      measured by a global positioning system. Intensity measures of average heart rate 
      (138 +/- 9 bpm), low-velocity movement (4.2 +/- 1.7%), high-velocity movement (0.6 +/- 
      0.6%), and average velocity (0.36 +/- 0.10 m.s) accounted for 42% of the 
      variability observed in T (38.32 +/- 0.34 degrees  C, r = 0.65, p = 0.01). Hydration 
      measures (percent body mass loss = -1.56 +/- 0.80%, urine specific gravity [Usg] = 
      1.025 +/- 0.006, and urine color [Ucol] = 6 +/- 1) did not add to the prediction of T 
      (p = 0.83). Metrics of exercise intensity accounted for 39% of the variability 
      observed in maximum T (38.83 +/- 0.42 degrees  C, r = 0.62, p = 0.02). Hydration measures 
      did not add to this prediction (p = 0.40). Low-velocity movement, high-velocity 
      movement, average velocity, BMI, and BSA were significantly different (p = 0.002, 
      p < 0.001, p = 0.02, p < 0.001, p < 0.001, respectively) between L vs. NL. Heart 
      rate and T were not different between L and NL (p > 0.05). Exercise intensity 
      primarily accounted for the rise in core body temperature. Although L spent less 
      time at higher velocities, T was similar to NL, suggesting that differences in 
      BMI and BSA added to thermoregulatory strain.
FAU - DeMartini-Nolan, Julie K
AU  - DeMartini-Nolan JK
AD  - Athletic Training Education Program, College of Health Professions, Sacred Heart 
      University, Fairfield, Connecticut.
FAU - Martschinske, Jessica L
AU  - Martschinske JL
AD  - Department of Kinesiology, Korey Stringer Institute, University of Connecticut, 
      Mansfield, Connecticut.
FAU - Casa, Douglas J
AU  - Casa DJ
AD  - Department of Kinesiology, Korey Stringer Institute, University of Connecticut, 
      Mansfield, Connecticut.
FAU - Lopez, Rebecca M
AU  - Lopez RM
AD  - Department of Orthopaedics, University of South Florida, Tampa, Florida.
FAU - Stearns, Rebecca L
AU  - Stearns RL
AD  - Department of Kinesiology, Korey Stringer Institute, University of Connecticut, 
      Mansfield, Connecticut.
FAU - Ganio, Matthew S
AU  - Ganio MS
AD  - Department of Kinesiology, University of Arkansas, Fayetteville, Arkansas.
FAU - Coris, Eric
AU  - Coris E
AD  - Department of Orthopedics, University of South Florida, Tampa, Florida.
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Strength Cond Res
JT  - Journal of strength and conditioning research
JID - 9415084
SB  - IM
MH  - Body Mass Index
MH  - *Body Temperature
MH  - *Body Temperature Regulation
MH  - Football/*physiology
MH  - Geographic Information Systems
MH  - Heart Rate
MH  - Hot Temperature
MH  - Humans
MH  - Male
MH  - *Organism Hydration Status
MH  - Universities
MH  - Young Adult
EDAT- 2017/12/07 06:00
MHDA- 2019/01/11 06:00
CRDT- 2017/12/07 06:00
PHST- 2017/12/07 06:00 [pubmed]
PHST- 2019/01/11 06:00 [medline]
PHST- 2017/12/07 06:00 [entrez]
AID - 10.1519/JSC.0000000000002137 [doi]
PST - ppublish
SO  - J Strength Cond Res. 2018 Oct;32(10):2888-2896. doi: 
      10.1519/JSC.0000000000002137.