Man performing a hollow hold
Thursday, May 21, 2026

MixedIsometrics

Four isometric holds rotated for three rounds: forty-five seconds of work, thirty seconds of rest. Holds challenge stability and endurance without dynamic load.

Before You Start

The WorkoutBriefing

Movements

  1. 01

    Forearm Plank

    Round 1 — 45s hold; tight glutes, ribs down

  2. 02

    Wall Sit

    Round 2 — 45s hold; thighs parallel, back flat against the wall

  3. 03

    Hollow Hold

    Round 3 — 45s hold; lower back pressed into the floor

  4. 04

    Side Plank

    Station 4 — 45s per side; timer swaps sides automatically with a 5s transition

Scaling

Easier

drop holds to 30s; bend knees on hollow hold; drop to side plank from knees

Harder

60s holds; add a single-leg variant on the front plank.

Timer Structure

What Today's TimerLooks Like

4 holds × 3 rounds. 45s hold / 30s station rest. 60s round break.

Forearm Plank
Wall Sit
Hollow Hold
Side Plank
Rest
Woman holding an iPhone running Seconds Interval Timer
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