# Core plank challenge programs

> Live situation record from CLSTR: https://clstr.news/situations/core-plank-challenge-programs
> Updated: 2026-07-31T04:00:38.000Z. Sources: 5. Developments: 2.

Fitness trainers have introduced structured core‑strength programs that build on progressive plank‑based routines. A 21‑day full‑body challenge designed by Andrea Landes adds a lateral plank crunch and the supine “dead‑bug” exercise to target obliques, transverse abdominis and lumbar stability, emphasizing controlled motion and modifications for safety.

Separately, French fitness coaches have promoted a five‑day plank challenge that increases hold time by five seconds each day. The programme stresses proper form—forearms under shoulders, straight spine, engaged abdomen and glutes—and aims to improve pelvic control, posture and back health for all ages.

Both initiatives illustrate a broader trend toward short‑term, progressive core workouts that combine specific plank variations with overall functional strength goals.

## Timeline

### 2026-07-31: Plank workout benefits and 5‑day challenge highlighted in France

Experts explain that daily plank strengthens core muscles and improves posture but does not melt belly fat alone; a five‑day challenge with three sets and 5‑second increments is recommended for safe progress.

3 sources. https://clstr.news/cluster/plank-workout-benefits-and-5day-challenge-highlighted-in-france

### 2026-07-17: ¡HOLA! 21‑Day Full Body Core Challenge Adds Lateral Plank Crunch and Dead‑Bug Exercises

The 21‑day ¡HOLA! full‑body core challenge, created by trainer Andrea Landes, now features a lateral plank‑crunch and a supine “dead‑bug” to boost abdominal strength and lumbar stability.

2 sources. https://clstr.news/cluster/hola-21day-full-body-core-challenge-adds-lateral-plank-crunch-and-deadbug-exercises

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Cite as: Core plank challenge programs. CLSTR, https://clstr.news/situations/core-plank-challenge-programs