# Muscle Growth & Bodybuilding Basics

## How Does Muscle Growth Happen?

Muscle growth, known as hypertrophy, happens when muscles experience a large amount of tension. A common misconception is that muscles must be "torn down" to grow back stronger — but that’s false. If that were true, marathon runners would have the biggest legs. However, it’s bodybuilders.

Muscles need a signal to grow, and that signal must be strong: high tension...

## Muscles Working Together

- Chest: Works with triceps and front delts.
- Back: Works with rear delts, pulls from various angles.

## Workout Splits and Routines

### Push, Pull, Legs (PPL)

The PPL split organizes training based on movement patterns:

- Push Day: Chest, shoulders, triceps
- Pull Day: Back, rear delts, biceps
- Leg Day: Full lower body

### Upper / Lower Split

4x per week alternating upper and lower days.

### Full Body Split

Trains all muscles 3x per week. Great for beginners.

### Bro Split

- Monday: Chest
- Tuesday: Back
- Wednesday: Shoulders
- Thursday: Arms
- Friday: Legs

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