Selley et al. (1995) Running intensity as determined by heart rate is the same in fast and slow runners in both the 10- and 21-km races

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Running intensity as determined by heart rate is the same in fast and slow runners in both the 10- and 21-km races

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CONTRIBUTORS:

	Author:	Selley, E. A.
	Author:	Kolbe, T.
	Author:	Van-Zyl, C. G.
	Author:	Noakes, T. D.
	Author:	Lambert, M. I.

JOURNAL:

Journal of Sports Sciences (JSS), 13(5), ?? - ??.

YEAR:

1995

PUB TYPE:

Journal Article

SUBJECT(S):

LONG-DISTANCE-RUNNING; HEART-RATE; TRAINING-LOAD; SPEED; CORRELATION; ACHIEVEMENT; AEROBIC-CAPACITY; MAN; ADULT

DISCIPLINE:

No discipline assigned

HTTP:

LANGUAGE:

English

PUB ID:

103-366-487 (Last edited on 2002/02/27 18:45:01 US/Mountain)

SPONSOR(S):

ABSTRACT:
The aims of this study were to determine (1) whether running speed is directly proportional to heart rate (HR) during field testing and during 10- and 21-km races, and (2) whether running intensity, as estimated from HR measurements, differs in 10- and 21-km races and between slow and fast runners at those running distances. Male runners were divided into a fast (65-80 min for 21 km; n = 8) or slow (85-110 min for 21 km; n = 8) group. They then competed in 10- and 21-km races while wearing HR monitors. All subjects also ran in a field test in which HR was measured while they ran at predetermined speeds. The 10-km time was signficantly less in the fast compared with the slow group (33:15 plus/minus 1:42 vs 40:07 plus/minus 3:01 min:s; mean plus/minus S.D.), as was 21-km time (74:19 plus/minus 4.30 vs 94:13 plus/minus 9:54 min:s) (P is less than 0.01). Despite the differences in running speed, the average running intensity (percent HRmax) for the fast and slow groups in the 10-km race was 90 plus/minus 1 vs 89 plus/minus 3 percent and in the 21-km race 91 plus/minus 1 vs 89 plus/minus 2 percent, respectively. In addition, percent HRmax was consistently lower in the field test at the comparative average running speeds sustained in the 10-km (P is less than 0.01) and 21-km (P is less than 0.001) races. Hence, factors in addition to work rate or running speed influence the HR response during competitive racing. This finding must be considered when running intensity for competitive events is prescribed on the basis of field testing performed under non-competitive conditions in fast and slow runners.

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