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Titolo:
Running economy of elite surf iron men and male runners, on soft dry beachsand and grass
Autore:
Pinnington, HC; Dawson, B;
Indirizzi:
Univ Western Australia, Exercise Physiol Lab, Dept Human Movement & Exercise Sci, Crawley, WA 6009, Australia Univ Western Australia Crawley WA Australia 6009 wley, WA 6009, Australia
Titolo Testata:
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 1, volume: 86, anno: 2001,
pagine: 62 - 70
SICI:
1439-6319(200111)86:1<62:REOESI>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENERGY-COST; OXYGEN COST; ENERGETICS; EXERCISE; RESPONSES; PERFORMANCE; MECHANICS;
Keywords:
lactate accumulation; oxygen consumption; energy cost; respiratory exchange ratio;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Pinnington, HC Univ Western Australia, Exercise Physiol Lab, Dept Human Movement & Exercise Sci, Crawley, WA 6009, Australia Univ Western Australia Crawley WA Australia 6009 Australia
Citazione:
H.C. Pinnington e B. Dawson, "Running economy of elite surf iron men and male runners, on soft dry beachsand and grass", EUR J A PHY, 86(1), 2001, pp. 62-70

Abstract

The primary aim of this study was to measure the energetics of six elite surf iron men (who participate in regular sand running training), performingsteady-state running trials on grass in shoes at 8. 11 and 14 km(.)h(-1), and on sand bare foot and in shoes, at both 8 and I I km(.)h(-1). The net total energy cost (EC, J(.)kg(-1.)m(-1)) was determined from the net steady-state oxygen consumption and respiratory exchange ratio (net aerobic EC) plus net lactate accumulation (net anaerobic EC). For the sand barefoot and sand in shoes running trials at 8 and 11 km(.)h(-1), net aerobic EC and total net EC (but not anaerobic EC) were significantly greater (P < 0.001) thanthe grass running trial values. No differences (P > 0.05) existed between the sand barefoot and sand in shoes trials. These measures were compared with data obtained from eight well-trained male recreational runners who performed the same protocol in a previous study. but who were not accustomed torunning on sand. Comparisons of net aerobic EC between the two groups for the surface conditions were not significantly different (P > 0.05). For netanaerobic EC, the iron man values were significantly less (P < 0.02) than the recreational runner Values. For net total EC. the iron man values were less than the recreational runner values. but the differences were only significant when both groups ran on sand barefoot (P < 0.03: on grass P = 0.158; on sand in shoes P = 0.103). The lower lactate accumulation values recorded for the iron men on both grass and sand may indicate that running on sand potentially reduces metabolic fatigue when running on firm or soft surfaces.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 15:02:23