You're ideas

[arms]

Do you think it is good to train hard and heavy for a month on certain exercises? Then train light for a month on different exercises so you are mixing it up and letting you're body relax a bit. Then changing it back so you are rotating every four weeks.

[Growth]

There is definatley room for both low rep heavy weight and high rep lighter weight. Not sure about the time frame though. I used to do them both in week, low reps near the start of the week, high at the end.

[jono]

Do you think it is good to train hard and heavy for a month on certain exercises? Then train light for a month on different exercises so you are mixing it up and letting you're body relax a bit. Then changing it back so you are rotating every four weeks.

i think the onyl reason to ever go "light" on any exercise is : injury, mental weakness. if you want your body to recover, take a week off.

[Pseudonym]

Absolutely. I think you need to keep changing it up.

I'd stay on each one a bit longer than a month though. You would just be getting into the swing of things, and it would be time to change... Go for 6-8 weeks instead.

Now, when I say light, I don't mean really light weights... I'd suggest choosing a weight you reach failure with between 12-15 reps. For the heavy phase, I'd suggest 4-8 reps.

[Mossley]

I agree with this aswell. Muffinman and I tend to stick to 6 weeks of heavy and then 1 -2 weeks of lighter weight and heavy reps just to shock the muscles.

Again, I agree that nobody should go too light, 15 reps should be a max.

[deegee]

I do an occasional week of light weights high reps just as a change of pace just because I feel like it, not very scientific but it is more a psycological thing than physical which can play a large part for me in my training anyway

[arms]

Cheers people, thanks for that.

[Spitterkat]

psuedonym is right on the money, id use the heavy only when the body needs a shock, or go lighter / take a week off on a periodized program.