J.b. Boren

07-07-1997, 05:43 AM

I agree with Greg Hart on two counts: that a pec tear in a 10RM

exercise is extremely unlikey, and that if one does occur, the end of

the set would provide a better opportunity than the beginning.

Statistically speaking, all factors held constant, the final rep

would be the most likely to result in a muscle tear. If the

probability of a tear on any given rep is (I'm making this number up

by way of example) 0.0005, then the probability of a tear on the 5th

rep would be 0.0025, and the 10th rep 0.005, etc. However, most of

us would agree that "all other factors" are rarely held constant.

The most likely scenario for a pec tear in a 10RM exercise would be

if there were an underlying muscle pathology, in which the tear would

probably occur either randomly or on the first rep. (This agrees

with the earlier posting, but for a different reason; if there is

an underlying pathology, a warm-up would not be beneficial).

If anyone can supply me with the actual probability of a muscle tear

of the pec while performing a bench press exercise, I will be glad to

write a Monte Carlo simulation to give a scenario on the likelyhood

of a tear on any given rep.

J. B. Boren, Ph. D.

Director of Sports Medicine and Exercise Science

Missouri Baptist College

St. Louis

exercise is extremely unlikey, and that if one does occur, the end of

the set would provide a better opportunity than the beginning.

Statistically speaking, all factors held constant, the final rep

would be the most likely to result in a muscle tear. If the

probability of a tear on any given rep is (I'm making this number up

by way of example) 0.0005, then the probability of a tear on the 5th

rep would be 0.0025, and the 10th rep 0.005, etc. However, most of

us would agree that "all other factors" are rarely held constant.

The most likely scenario for a pec tear in a 10RM exercise would be

if there were an underlying muscle pathology, in which the tear would

probably occur either randomly or on the first rep. (This agrees

with the earlier posting, but for a different reason; if there is

an underlying pathology, a warm-up would not be beneficial).

If anyone can supply me with the actual probability of a muscle tear

of the pec while performing a bench press exercise, I will be glad to

write a Monte Carlo simulation to give a scenario on the likelyhood

of a tear on any given rep.

J. B. Boren, Ph. D.

Director of Sports Medicine and Exercise Science

Missouri Baptist College

St. Louis