Originally posted by: brikis98
Originally posted by: silverpig
I'm looking for fitness rather than strength.
Heh, it would be well worth your time to read the
What is Fitness? article in the Crossfit Journal. I'm not sure how you define "fitness", but it seems weird to me to not consider strength a key component of it.
Originally posted by: silverpig
I don't use any weights when I do the abs, and I generally do each ab exercise until I can't anymore. Doing 10 of each won't really do much for me I don't think.
You wouldn't do sets of 5-8 with the same exercise you are doing now and artificially stop even though you can do far more. There would be no point to that. Instead, you'd do a weighted version of the exercise (or just a different, harder exercise) where 5-8 reps is all you can muster in a set. The number of reps you do just corresponds to what percentage of your 1 rep max (1RM) you are doing. For example, if you are doing sets of 5, you are using around 85% of a weight that you could only do for 1 rep. If you are doing sets of 10, you are using around 70% of your 1RM.
Training in different rep ranges - that is, training with different percentages of your 1RM - have completely different effects on your body. Although there will certainly be overlap, very roughly speaking, 1-6 reps is primarily strength, 7-12 reps is primarily muscle size, and anything above that is almost entirely muscular endurance. Therefore, the number of reps you do for an exercise should match your goals.
Originally posted by: silverpig
I don't do too much with free weights, although I do some forearm exercises with some dumbells by rolling them in my fingers up and down.
You said in your first post that you do "some weights". If you aren't using free weights... does that mean that "some weights" refers to exercise machines?