Helix

Training Library

173 exercises, mapped to the muscle.

Every exercise in the Helix catalog — which muscles it works and how hard, the equipment it needs, and how long each muscle takes to recover before you load it again.

173 exercises16 musclesPer-muscle involvementRecovery windows

Collections

19 themed programs built from this catalog, then audited by the app's per-muscle recovery math: famous fictional routines, military standards, progression roads and archetype plans.

All collections →

Muscle

Category

01

Chest

17

02

Back

21

03

Shoulders & Traps

17

04

Biceps

10

05

Triceps

10

06

Forearms

5

07

Quads

17

08

Hamstrings

10

09

Glutes

9

10

Calves & Lower Leg

5

11

Adductors

2

12

Core

20

13

Olympic & Power

5

14

Kettlebell

5

15

Calisthenics

6

16

Conditioning & Cardio

14

Free calculators

Every number, computed properly.

TDEE, heart-rate zones, VO₂max and more — the real formulas, free, no signup.

Open the tools →

Helix for iPhone + Apple Watch

Recovery tracked per muscle, from every set.

Helix logs your lifts against this same catalog and tracks each muscle’s recovery — free, on-device, no account.

Download Helix — Free

Image credits

Exercise form illustrations are © Gym visual, with additional artwork from RepDB and photography from free-exercise-db. Each exercise page names the source of its own illustration. The muscle maps and involvement data are ours.