ENDURANCE – BIKE – OVERREACHING – PROTEIN


1 RESEARCH ARTICLE


HIGH DIETARY PROTEIN RESTORES OVERREACHING INDUCED IMPAIRMENTS IN LEUKOCYTE TRAFFICKING AND REDUCES THE INCIDENCE OF UPPER RESPIRATORY TRACT INFECTION IN ELITE CYCLISTS – 2014


Witard OC1, Turner JE2, Jackman SR3, Kies AK4, Jeukendrup AE5, Bosch JA6, Tipton KD7
DESIGN
8 cyclists (VO2max: 64.2±6.5mLkg(-1)min(-1)) undertook two separate weeks of high-intensity training while consuming either a:
(1) high protein diet (3g/kg(-1) protein BM (-1)day(-1))
EX: 176 lbs or 80 kg x 3 g = 240 grams protein per day

(2) an energy and carbohydrate-matched control diet (1.5g/kg(-1) protein BM (-1)day(-1))
EX: 176 lbs or 80 kg x 1.5 g = 120 gram protein per day

– High-intensity training weeks were preceded by a week of normal-intensity training under the control diet
– Leukocyte and lymphocyte sub-population responses to acute exercise were determined at the end of each training week
– Self-reported symptoms of upper-respiratory tract infections (URTI) were monitored daily by questionnaire
RESULTS
(1) High-intensity training on a high PRO diet restored leukocyte kinetics to similar levels observed during normal-intensity training
(2) High-intensity training on a high PRO diet was associated with fewer symptoms of URTI compared to high-intensity training + normal diet
CONCLUSION
– High PRO diets might reduce incidence of URTI in athletes potentially mediated by preventing training-induced impairments in immune-surveillance


 

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