Steve
Whatever was the cause of Babe Ruth's "bellyache" is unknown....however, it was a "blessing in disguise".
Too, too many stories about the Babe not taking care of his physique. Not really so. In 1925, Ruth was out of shape, his weight peaked up to 245 lbs,
and his "less than Ruthian" performance that year reflected this (his BA fell below .300).
The Babe was determined to get back into shape. So, during the Winter of 1925 he started a rigorous physical training regime at a New York City gym.
And, every Winter there-after, Ruth continued this fitness program. By the start of the 1926 season, Ruth's weight was down to 205 lbs.
His fitness program paid dividends....in 1926, Ruth batted .372, 47 HR's, and 153 RBI's.
In fact, if you compare Ruth's performance from 1926 - 1932, you will see that he out-performed his younger years. Check-out his stats, do the math.
And, you will realize what I am saying is true.
TED Z
T206 Reference
.