These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: A laboratory method for determination of anaerobic energy expenditure during sprinting.
    Author: Thomson JM, Garvie KJ.
    Journal: Can J Appl Sport Sci; 1981 Mar; 6(1):21-6. PubMed ID: 7226429.
    Abstract:
    Highly trained sprinters, marathon runners and untrained male control subjects were studied during treadmill sprinting. After confirming a workload which elicited exhaustion in just over a minute (mean time to exh. = 64.6 +/- 2.5 sec.), each subject performed sprints of 15, 30, 45 and 60 seconds duration in order that their energy expenditure could be segmented per 15-sec. of sprinting time. During every sprint, O2 consumption was recorded by closed-circuit spirometry. Following each sprint, serial 30-sec. venous blood samples were drawn in order to determine the peak lactate concentration. Energy expenditure was therefore determined as follows: i) aerobic energy from increments in O2 uptake, expressed in Kcal; ii) lactacid energy from increments in peak lactate, with the difference between peaks utilized to calculate the anaerobic glycolytic contribution to that 15-sec. segment, expressed in Kcal according to Margaria; iii) alactacid energy, expended over the initial 15-sec. segments, from the difference between the total energy requirement per 15-sec. less the measured aerobic plus the lactacid contributions. The sprinters expended the greatest (p less than .05) anaerobic energy (46.2 +/- 5.1 Kcal) when compared to either the marathoners (31.6 +/- 5.7 Kcal) or controls (33.0 +/- 1.6 Kcal). The athletic groups demonstrated superior alactacid energy (sprinters = 21.4 +/- 4.4 Kcal; marathoners = 15.8 +/- 2.3 Kcal), both expending a substantial amount of energy from this source (20%) past 30-sec. In contrast, over the initial 30-sec. of sprinting, the control subjects had depleted their alactacid energy (12.2 +/- 3.3 Kcal). Only minor differences were observed in aerobic energy expenditure between the three subject groups throughout the sprint to exhaustion.
    [Abstract] [Full Text] [Related] [New Search]