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Exercise‐induced increase in plasma volume and albumin content is enhanced by protein and CHO intake just after exercise
Author(s) -
Okazaki Kazunobu,
Takeda Ryosuke,
Suzuki Akina,
Naghavi Nooshin,
Imai Daiki,
Miyagawa Toshiaki
Publication year - 2012
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.26.1_supplement.lb744
Subject(s) - albumin , cycle ergometer , medicine , endocrinology , plasma volume , chemistry , zoology , biology , heart rate , blood pressure
Plasma volume (PV) expands with plasma albumin content (Alb cont ) after a bout of exercise, which is known to be enhanced by post‐exercise protein and CHO intake. It is unknown which is a key condition to enhance PV and Alb cont expansion; the timing of protein and CHO intake after exercise or the total amount of daily protein and energy intake. METHODS Seven young men (~23 yrs) completed two trials those of which differ in the timing of intake (immediately after exercise, 0H; and 2.5 hours later, 2.5H) of a mixture of protein and CHO (3.2 kcal and 0.18 g protein/kg). Subjects performed a bout of 72‐min intense and intermittent exercise (8 sets of 4 min at 80% VO 2max intermittent by 5 min at 20% VO 2max ) by using an upright cycling ergometer. PV and Alb cont (PV x [plasma albumin concentration]) were determined before exercise, at the end of exercise, every hour from the 1st to the 5th hour and at the 23rd hour after exercise during. RESULTS In 2.5H, Alb cont and PV increased from before exercise by 0.5% and −3.5% at the 5th hour and by 1.6% and 1.8% at the 23rd hour, respectively. In 0H, on the other hand, Alb cont and PV increased by 3.1% and −0.6% at the 5th hour and by 2.1% and 3.5% at the 23rd hour, respectively. The increase in Alb cont and PV at the 5th and 23rd hour was significantly higher in 0H than in 2.5H. CONCLUSIONS Protein and CHO intake just after exercise is a key condition to enhance the increase in Alb cont and PV.