Peltonen and Rusko (1993) Interrelations between power, force production and energy metabolism in maximal leg work using a modified rowing ergometer

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Interrelations between power, force production and energy metabolism in maximal leg work using a modified rowing ergometer

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CONTRIBUTORS:

	Author:	Peltonen, J.
	Author:	Rusko, H.

JOURNAL:

Journal of Sports Sciences (JSS), 11(3), ?? - ??.

YEAR:

1993

PUB TYPE:

Journal Article

SUBJECT(S):

ROWING-ERGOMETRY; ENERGY-METABOLISM; MUSCLE; ENDURANCE; FATIGUE; ELITE-ATHLETE; MAN; LEG; CORRELATION

DISCIPLINE:

No discipline assigned

HTTP:

LANGUAGE:

English

PUB ID:

103-366-384 (Last edited on 2002/02/27 18:45:01 US/Mountain)

SPONSOR(S):

ABSTRACT:
The dependence of power on aerobic and anaerobic energy metabolism and on force production was studied in maximal leg exercise. National and international level male rowers (n=9) performed four modified (legs-only) rowing ergometer exercises: a progressive test, 2-min (T2), 12-min (T12) and 6-min (T6) all-out tests. In T2, significant correlations were observed between power in T2 (PT2) and oxygen debt (r=0.83), P less than 0.05) and between PT2 and average force production (Fav) during the last 30 s (r=0.85), P less than 0.05). These parameters explained 93 percent of the variation in PT2. The highest correlations between power in T6 (PR6) and physiological parameters were as follows: maximal oxygen uptake (VO2max: r=0.87, P less than 0.01), blood bicarbonate concentration before the test ((HCO- 3 before): r=0.85, P less than 0.05) and blood lactate concentration on anaerobic threshold (BLa AnT: r=-0.82, P less than 0.05). Together, these parameters explained 92 percent of the variation in PT6. In T12, the total power (PT12) correlated with power of anaerobic threshold (P AnT: r=0.95, P less than 0.001) and with the highest VO2 value in this test (VO2peak: r=0.92, P less than 0.001).These two parameters explained 96 percent of the variationin PT12. The decrease of at least one of the force parameters during each test was taken as a sign of fatigue. The decline in force was compensated for by an increase in stroke rate at the end of T6 and T12 (P less than 0.01, P less than 0.001). Consequently, the power remained unchanged or even increased at the end of T6 and T12. The term 'power endurance; is introduced to describe the ability to resist and to compensate for local muscular fatigue.

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