If a sit-up is easy, it’s useless.
Day 272 of 360
Double kettlebell front squat: 7 x 3 @ minimum one interval above heaviest previous effort

If sets require interruption at chosen weight, make as minor an adjustment as needed and complete the next uninterrupted. When scheme is listed as “7 x 3″, it always refers to “Sets” x “Reps”. Reminder: Position and range of motion always govern weight.

Then:

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Source:: Breaking Muscle