Advanced HIIT Protocols: Tabata, 10-20-30, and More
Compare 4 advanced HIIT protocols — Tabata, Norwegian 4x4, 10-20-30, Sprint Intervals — with scientific evidence. Choose the right protocol for your goal.
Expert guides and tips about Workouts by Fitness Level
Explore 10 expert guides on Workouts by Fitness Level. Each resource is grounded in exercise science and designed for 1–10 minute daily sessions — no equipment needed. Start with what interests you most.
Compare 4 advanced HIIT protocols — Tabata, Norwegian 4x4, 10-20-30, Sprint Intervals — with scientific evidence. Choose the right protocol for your goal.
Advanced bodyweight workout plan using periodization blocks, maximal strength, and skill work. No equipment. Built on exercise science for serious athletes.
Start cardio from scratch with this 8-week beginner cardio plan. Progressive walking, interval training, and heart rate guidance. No equipment needed.
Start beginner strength training with this 12-week bodyweight program. 4 progressive phases, no equipment. Science-backed for first-time lifters.
Start your fitness journey with this science-backed 4-week beginner workout plan. No equipment needed. Builds habit and strength from day one.
Assess your current fitness level with 5 validated tests covering strength, endurance, flexibility, and cardiovascular capacity. No lab needed.
Track your fitness progression with 7 evidence-based milestones from your first week to 2 years of training. Know exactly where you stand and what comes next.
Break through beginner plateaus with this 8-week intermediate workout plan. Progressive overload, periodization blocks, and zero equipment needed.
Return to exercise safely after weeks or months away. Science-backed 4-phase plan using muscle memory and progressive reloading. No equipment needed.
The evidence-based workout plan for sedentary adults. Start with 5 minutes a day and build safely to WHO guidelines. No experience needed.
AI coaching promises personalized workouts without the cost of a trainer. What research shows about app-based fitness programming and who benefits most.
New to fitness? This evidence-based guide covers your first bodyweight workout at home: what to do, how long, and the science behind starting small.
Can you really build muscle without weights? EMG studies and hypertrophy research say yes. Here is the science behind bodyweight strength training.