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STILL IN MOTION
Because slowing down isn’t in the plan.
THURSDAY DEEP DIVE: THE STRENGTH MOVE
Sunday’s issue introduced the Dumbbell Lateral Raise. Today we provide a cable variation that offers constant tension and a unilateral progression that corrects shoulder asymmetry.
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PROGRESSION 1: CABLE OR BAND LATERAL RAISE (CONSTANT TENSION)
Best for: People who want a more consistent resistance curve than the dumbbell provides. The dumbbell lateral raise is hardest at shoulder height and easiest at the start; the cable or band is hard throughout the full range.
How to do it:
Anchor a handled resistance band at floor level, or use a cable machine at the lowest setting
Stand sideways to the anchor, hold the handle in the far hand
Raise the arm out to the side to shoulder height, then lower slowly
12 to 15 reps per side, 3 sets
PROGRESSION 2: DUMBBELL LATERAL RAISE (SUNDAY’S EXERCISE) WITH PAUSE
Adding the pause at shoulder height converts the exercise from a ballistic movement (relying on momentum) to a fully muscular movement:
Raise to shoulder height at normal speed
Hold the top position for 2 to 3 seconds with the deltoid fully contracted
Lower over 4 seconds
This tempo eliminates the momentum that allows people to use excessive weight, and significantly increases the muscle time under tension
PROGRESSION 3: SINGLE-ARM LATERAL RAISE WITH SUPPORT
Best for: Exposing and correcting left-right shoulder strength asymmetry.
How to do it:
Hold a fixed surface (a doorframe or squat rack upright) with the non-working hand for stability
Perform the lateral raise with the working arm only — the support allows you to isolate the movement completely without core and trunk compensation
Perform all reps on the weaker side first, then match that rep count on the stronger side
12 to 15 reps per side, 3 sets
Vitamin D and Type II Muscle Fiber Function
Vitamin D receptors in muscle tissue are predominantly located in type II (fast-twitch) muscle fibers — the fibers responsible for power, rapid force production, and balance reactions. Research consistently shows that vitamin D deficiency is associated with preferential type II fiber atrophy, reduced muscle power (as distinct from muscle strength), and increased fall risk in older adults.
The lateral raise and shoulder abduction work in this issue specifically targets deltoid type II fibers during the controlled explosive concentric phase. Ensuring adequate vitamin D status optimizes the response of these fibers to the training stimulus — one of the specific reasons the vitamin D issue is placed in the same week as shoulder abduction training.
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COMING UP
Saturday closes out the issue with the complete vitamin D testing and supplementation toolkit.
Still moving forward,
— The SIM60 Team
simsixty.com · Because slowing down isn't in the plan.
Educational content only. Not medical advice. SIM60 is not a medical provider and does not diagnose or treat any condition. Consult your physician or a licensed physical therapist regarding your specific symptoms before beginning any exercise described here.
