What is the single best exercise for weight loss?

Daily brisk walking. It is easy to sustain, low-impact, keeps stress hormones down, and adds up to a real calorie burn without wrecking recovery.

Do I need to do cardio to lose weight?

You need a calorie deficit. Cardio helps create it, but strength training preserves muscle so the weight you lose is fat, not tissue.

Give it 4–6 weeks of consistent movement paired with a modest food deficit. The first 2 weeks are mostly water.

cardio · treadmill

The '12-3-30' style walk — high calorie burn, low joint stress.

1 × 30–45 min 30 minrest 0s

Log your sets with a rest timer and one-tap save.

Equipment

treadmill

Rest

0s between sets

Primary muscles

glutes, quads, calves

Also works

cardiovascular

Set incline between 8–12% and speed between 3.0–3.5 mph.
Walk without holding the handrails — arms swing freely.
Aim to keep heart rate in Zone 2 (comfortably hard, can still talk in short sentences).
Target 30–45 minutes, 3–5 times per week.