Classic sit ups not bio-mechanicly relevent?

Thanks James, for the past 4 weeks I have been using your format with some of my clients with great results.

[b]- warm up approx 20-30min

  • tempo runs/drills approx 30min
  • abs/med ball rebounds approx 30min
  • auxiliary resistance training approx 30min[/b]

How far into the offseason program do you use the above format?