Effects of active and passive recovery on blood lactate and blood pH after a repeated sprint protocol in children and adults.
The aim of this study was to compare the effect of active (AR) and passive recovery (PR) after a high-intensive repeated sprint running protocol on physiological parameters in children and adults. Blood lactate (La) and blood pH were obtained during two sets of 5 × 5 s all-out sprints and several times during subsequent 30-min recovery in 16 children and 16 adults. End-exercise La was significantly lower and pH significantly higher in children (La: 5.21 ± 2.73 mmol·L-1; pH: 7.37 ± 0.06) compared with adults (La: 10.35 ± 5.76 mmol·L-1; pH: 7.27 ± 0.10) (p < .01). La half-life during postexercise recovery was significantly shorter in children (AR: 436 ± 371 s, PR: 830 ± 349 s) than in adults (AR: 733 ± 371 s, PR: 1361 ± 372 s), as well as in active compared with passive recovery for both age groups (p < .01). The age x recovery interaction for La half-life only approached statistical significance (p = .06). The results suggest a faster lactate disappearance and an earlier return to resting pH after a repeated sprint running protocol in children compared with adults and a less pronounced advantage of active recovery in children.
Dept. of Training & Exercise Science, Ruhr-University Bochum, Bochum, Germany.
Jennifer
J
Kappenstein
Florian
F
Engel
Jaime
J
Fernández-Fernández
Alexander
A
Ferrauti
D000328:Adult; D000367:Age Factors; D054874:Athletic Performance; D015415:Biomarkers / Q000097:blood; D002648:Child; D018592:Cross-Over Studies; D005080:Exercise Test; D064368:Healthy Volunteers; D006339:Heart Rate; D006801:Humans; D006863:Hydrogen-Ion Concentration; D019344:Lactic Acid / Q000097:blood*; D016014:Linear Models; D012420:Running / Q000502:physiology*
D015415:Biomarkers; D019344:Lactic Acid