I've been working on strength training with a trainer over the last 8 months. We generally work together once a week. Following the advice of most of the main paleo authors, I've cut out my 'chronic cardio'. I've lost about 40lbs in the last year and am generally pleased with my body composition, but want to increase my 'useful strength'.
My trainer has been working to improve my squatting technique, particularly the depth that I can manage with good form. There has been a definite improvement there but I have been struggling with fatigue around the third set. This is limiting the number of good reps and my progress.
Do you think that adding a sprint session halfway through the week will assist me or is there a better series of complementary exercises that I should consider?
Edit: added in response to the many helpful comments
I am squatting once every 7 days. Routine is
Warm up set of 12 reps. Heavier warm up set, 10 reps Working weight aiming for 3 sets of 10 reps, today, 10, 10, 7.
Lowering to a slow count of 4 then up on 1. I am getting properly deep under supervision.
A number of replies refer to 5 x 5 instead. Is there a link to the basis for this please?