Take a look at how Sergio and Serge trained chest. Both are from the old school.Both had huge chests. Both from different areas, and both didn't use full ROM.
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Parker, there are EXCEPTIONS to everything. On AVERAGE, guys back then used a greater range of motion compared to the guys now.
Its funny the way it works out:
1970s: Less drugs, better diets, more hard work, good builds and more full ROM
2014: MORE drugs, less hard work, shittier diets, shittier builds and less full ROM