HIIT Workout Plan: A 4 Week Programme To Boost Fitness

What Should A HIIT Plan Include | How Much HIIT | 4-Week Structure | Adapting HIIT | Weight Loss | Muscle Building | Recovery | Tracking Progress | FAQs

HIIT workouts are popular for a reason — they're a super-efficient way of getting impressive results with short workouts. Whether your goal is fat loss, muscle building, or endurance, a structured HIIT workout plan can help you make progress safely.

In this article, PureGym Portsmouth North Harbour Assistant Gym Manager and PT Phil Carpenter shares tips for creating your own HIIT programme and a beginner-friendly 4 week HIIT plan you can use to build strength and fitness.

You can learn more about what HIIT is and the benefits here.

• A structured 4 week HIIT plan will increase intensity over time

• A good HIIT training programme balances progress and recovery

• Most people benefit from 2—3 HIIT sessions per week

• HIIT can support fat loss, fitness, and muscular endurance

• Recovery days are important for progress with HIIT workouts

When done consistently, HIIT is a powerful, time efficient way to improve your fitness and endurance. However, HIIT workouts are intense and shouldn't be overdone. Following a HIIT plan can help with consistency and progression while reducing the risk of overtraining.  

A good HIIT workout schedule will factor in progression over time while allowing enough rest that you can completely recover between sessions.   

When creating a balanced high intensity interval training workout plan, these are the things you should consider:

• Progressive overload: The volume and intensity of your workouts should get harder throughout the plan to reflect improvements in your fitness, endurance, and confidence.

• Difficulty: Start with exercises that match your current level and gradually increase the difficulty by choosing harder exercise variations, heavier weights, or longer intervals.

• Recovery: Leave at least a full day between workouts and aim to do a maximum of 2-3 HIIT workouts each week to allow enough time for your body to recover. You can add in strength training, mobility workouts, or low intensity cardio on some of the days if you prefer to workout more than 3 times a week.

• Exercises: Include a mix of cardio and strength based movements in your HIIT workouts, especially if you aren't planning on including other strength and cardio workouts in your plan.

HIIT workouts are intense and need plenty of recovery time between sessions. For most people, 2-3 HIIT sessions per week is the ideal balance between effort and recovery. Beginners should start with 1-2 sessions per week, and intermediate and advanced exercisers can increase to three.

This 4 week HIIT plan has four different HIIT workouts, with each week building on the last as your fitness grows.

You can swap out one of your usual sessions for these workouts, or if you're looking to start a fresh plan you could follow this weekly structure:

• Monday: HIIT workout

• Tuesday: Low intensity cardio

• Wednesday: Full body strength

• Thursday: HIIT workout

• Friday: Mobility

• Saturday: Full body strength

• Sunday: Rest

Remember to include a warm up before each workout and finish with some stretches.

The first week of this HIIT programme focuses on technique, consistency, and building a fitness base. Get comfortable with movements and pacing and focus on control, not speed.

20 minute beginner HIIT workout

For this workout, do 30 seconds max intensity intervals followed by 60 seconds rest. Complete 3-4 rounds of the circuit.

• Goblet squats

• Push ups or knee push ups

• High knees

• Plank hold

This week's workout increases the intensity and reduces rest periods.

20-25 minute HIIT workout

Do each exercise for 40 seconds followed by 40 seconds rest. Complete 4 rounds of the circuit.

• Jump squats

• Push ups or knee push ups

• Mountain climbers

• Alternating lunges

Focus on challenging capacity and endurance by increasing volume and intensity (or resistance if you're using weights).

25-30 minute HIIT workout

Do 4-5 rounds of 45 seconds work, 30 seconds rest.

• Burpees

• Dumbbell squat to press

• Plank shoulder taps

• Jump lunges

Push to your maximum effort. If you want to measure improvement, do the same workout as week 1 and compare fatigue levels and number of reps completed in the time.

30 minute HIIT workout

5 rounds of 50 seconds work, 20 seconds rest.

• Burpees

• Dumbbell thruster

• Mountain climbers

• Plank hold

A good HIIT plan should meet you where you’re at, which can mean tailoring the workouts if you find them too easy or hard. Fortunately, HIIT workouts are easy to adapt!

• Increase rest periods

• Reduce total workout time

• Choose lower impact exercises

• Increase work intervals

• Reduce rest periods

• Add weights or resistance

• Add extra rounds

Creating a calorie deficit through your diet is the best approach to weight loss, rather than relying on exercise alone. That said, research shows that people who exercise are more likely to lose weight and maintain this loss than those who are inactive.

A high intensity interval training workout plan can support fat loss in a few ways:

• Burns calories in a short amount of time: HIIT workouts burn significantly more calories than steady state cardio, and does so in a short amount of time. A 25 minute HIIT workout to your week can burn around 200-500 calories

• Boosts metabolism: One of the benefits of HIIT workouts is that your body continues to burn calories for up to 24 hours after the workout as it replenishes oxygen and energy stores. This boost in metabolism can help widen the calorie deficit and boost fat loss.

• Easy to fit in: Squeezing in an hour workout isn't always feasible, but with HIIT you can get a solid workout in as little as 10 minutes. This makes staying active more accessible for busy periods.

Combining HIIT workouts for weight and fat loss with steady movement and strength work is a good approach as it maximises calorie burn while maintaining muscle and boosting fitness. Across the week, this could look like:

• 2 x HIIT workouts

• 1 x steady-state cardio workout

• 2 x full body strength workouts

HIIT can complement muscle building goals when combined with strength training. To use HIIT workouts for muscle building, include explosive exercises like squat jumps and burpees that help with conditioning and power. In your strength sessions, lift moderate to heavy weights and progressive overload by increasing the weights or reps each week.

A weekly routine for building muscle with HIIT could be:

• 1-2 x HIIT sessions

• 2-4 strength training sessions depending on workout split

HIIT puts significant stress on the body and benefits from a ‘less is more’ approach. Keep HIIT to just 2-3 sessions a week, with at least a full day between each HIIT workout. On non HIIT days, you can do other workouts like steady state cardio, strength training, and mobility work, but include at least one full rest day each week.

Recovery isn’t just about resting. Making sure you’re getting enough sleep and plenty of fruit and veg, protein, carbs and fats will help your body to recover from your workouts.

Tracking progress helps keep your HIIT programme motivating as you see the changes in your fitness and strength. Simple ways to measure improvement include:

• Reps completed in a set time (e.g. burpees in 30 seconds)
• Reduced rest needed between intervals
• Improved recovery time (heart rate drops quicker)
• Increased rounds or workout duration
• Better form and control

You can also track how you feel in terms of energy, stamina, and improved confidence — all good signs of progress.

Ready to start HIIT training?

If you want help building a personalised HIIT workout plan, speak to a PureGym Personal Trainer. Find your nearest PureGym to get started.