I vote yes, depending on the type of training, and if you are in the right condition relative to the type of training. And for the record, I am soon to be 51.

I think that actually has more to do with how long did you train before. If you trained many years before that should not be a problem for you IMHO.

I voted yes because it's a rather vague question. Totally depends on the person and the workout they're thinking about doing. If it's simply sit ups, push ups and cardio, why not? Anyone can, and should imo, do those. If it's a 55 year old wanting to try 5x5's on the bench w/ weight he not comfortable with, then no.
Just my .02

If your doing it right, lifting hard/heavy, good routine then 3 time a week is definitely enough.
Unless your on something and if you are and can train 5 times a week and get results ill buy some.

I dont see why anyone would even need to workout more than 3 times a week

i think its more ego that gets people to train that often.
lack of knowledge and ego. the more is better mentality that rightfully has its place in society....but not bodybuilding.

I am 63 and have trained since I was 14.I now work my body parts(chest-back -shoulders- biceps- triceps-legs) once a week and in four days.The sets are between 9 and 12 per body part.I see a doc. regularly and am on HRT.It would be advisable to get a physical and blood test at least once a year to see where your at.Just an old mans opinion.

I voted yes, my old man is 55 and still trains like a young man, but he isnt ur average man..

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"I murdered a rock, I injured a stone and hospitalised a brick, am so bad I make medicine look sick" Best of Mohamed Ali!

I vote no cause this thread 5 years old and I going senile