This article is from the Hardgainer Bodybuilding & Weightlifting FAQ, by Frank J. Kelly and Craig R. Sadler with numerous contributions by others.
If you have had a serious back injury, get the clearance of a
sports-oriented chiropractor first before working these lifts.
Even if you have had any minor back injuries, get a chiropractor's
clearance.
NOTE: For many hardgainers, working the squat and the classic
deadlift may be too hard on the lower back. Try doing the Squat and
the Stiff-legged deadlift OR the classic Deadlift and use the
(horizontal) leg press. Beginners should not try the Stiff legged
Deadlift until they have done at least 6 months of weight-lifting
including the classic DL as the SLD can be dangerous for the
newcomer if not done right.
The vertical leg-press is not recommended due to shearing forces
involved and the problems it sometimes causes in the lower back.
 
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