Exercise, Fitness and Strength

Fitness and Strength decide how long you can fight and how much you can carry, and they barely move unless you train them. This page covers every exercise, regularity, the stiffness that follows and how to build a routine. Updated for Build 42.21 Stable and 42.22 Pre-Release, November 2026.

Survivors indoors — Train indoors with the door shut · Official image, The Indie Stone

01Part

Every exercise

Open the Exercise menu from the Health panel. Sessions run 10 to 60 minutes in 10-minute steps.

Exercise	Trains	Equipment	XP per rep	Strain on
Squats	Fitness	None	Fitness +4	Legs
Sit-ups	Fitness	None	Fitness +2	Abs
Push-ups	Strength	None	Strength +4 (arms), +2 (chest)	Arms, chest
Burpees	Both	None	Strength +6, Fitness +4	Legs, arms, chest; heavy endurance drain
Barbell curls	Strength	Barbell (6.0 weight)	Not listed	Arms, chest
Dumbbell presses	Strength	Dumbbell (5.0 weight)	Not listed	Arms
Bicep curls	Strength	Dumbbell	Not listed	Arms

Figures from one 42.19 guide (one source). Free weights carry the biggest Strength multipliers (x1.8 for dumbbells), and forged weights do not count as equipment.

02Part

When you can and cannot train

The menu will not start if you are too tired, carrying more than Heavy Load level 2, in pain above level 3, or sitting, driving or climbing. Each exercise has its own regularity from 0 to 100: doing it often raises it, which cuts the endurance cost and the stiffness afterwards. Fitness Instructors, Fire Officers and Security Guards can start with some regularity.

03Part

Stiffness the next day

About 12 hours after a session the worked body parts become stiff or sore, and heavy moves make it worse. Nothing removes it instantly: rest, manage the pain and rotate body parts across days. Stiff arms make you weaker in a fight, so do not train before a loot run. Pain relief is on health.

04Part

Weight and leveling

Stay between about 75 and 85 kg while you level Fitness. At Fitness 6 and above, Fitness XP stops while you are Emaciated, Very Low Weight or Very High Weight, and from Fitness 9 High Weight blocks it too (one source). Food and calories are on food list and cooking.

Fitness Instructor (−6 points) gets XP boosts of +3 Fitness, +2 Sprinting and +1 Strength and starts with Nutritionist. Other traits are on traits and occupations.

05Part

A simple routine

Opinion Train in a closed, cleared room. Start with 10 to 20 minutes of one or two moves, alternate legs (squats) and arms (push-ups) on different days, and switch to dumbbells as soon as you find them. Burpees are efficient but drain endurance fast, so save them for days you stay home.

06Part

Our take: which exercise gives the most per rep

We applied each exercise’s XP multiplier to its base XP per rep to compare them on one scale (no-equipment moves only, since free-weight base values are not published):

Exercise	Fitness per rep	Strength per rep	Total per rep
Burpees (×0.8)	3.2	4.8	8.0
Push-ups	–	6	6
Squats	4	–	4
Sit-ups	2	–	2

What that means: burpees give the most XP per rep and train both stats, but they drain endurance hard and stiffen legs, arms and chest at once. For a steady weekly plan, alternate squats (legs, Fitness) with push-ups (arms and chest, Strength) so one group rests while the other works, and save burpees for days with nothing else planned. Sit-ups are the weakest move here, so only use them to fill a gap while your legs recover.

07Part

Quick answers

What is the best exercise in Project Zomboid?

Burpees train both skills, but dumbbell presses and bicep curls give the biggest Strength multiplier once you have weights.

Why can’t I exercise?

You are too tired, too heavily loaded, in too much pain, or not standing idle.

How do I get rid of exercise stiffness?

Rest and wait; nothing removes it instantly. Rotate body parts so it does not stack.

What weight should I be to level Fitness?

About 75 to 85 kg. Very low or very high weight blocks Fitness XP from level 6.

Exercise figures come from one Build 42.19 guide and are marked. Sources: PZFans fitness guide. Your game is the final word: if it disagrees with us, tell us and we will fix the page.