Lumbar isometric crunch
Lumbar

- Lying face down.
- Place your hands behind your head and perform a lumbar contraction so that your chest lifts off the ground.
- Hold this position for a set amount of time.
Sessions
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Biceps ∙ Abs ∙ Calves ∙ Glutes ∙ Hamstrings ∙ HipFlexors ∙ Lats ∙ LowerChest ∙ Lumbar ∙ Quadriceps ∙ Triceps

Burpee with muscle up
Biceps ∙ Triceps ∙ Abs ∙ Lats ∙ LowerChest ∙ Calves ∙ Glutes ∙ HipFlexors ∙ Lumbar ∙ Quadriceps

Burpees
Triceps ∙ Quadriceps ∙ Abs ∙ HipFlexors ∙ LowerChest ∙ Calves ∙ Glutes ∙ Lumbar

Straddle press
Triceps ∙ AnteriorDeltoid ∙ Lumbar ∙ Serratus ∙ UpperChest ∙ UpperTrapezius

Kettlebell swing with twist
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Sliding push-ups
Abs ∙ Lumbar ∙ UpperChest ∙ LowerChest ∙ Triceps