icon-account icon-glass

Join the community!

We'll keep you up to date with interesting news, product information and offers so you never miss out.

No boring newsletters and we'll never share your address. You can unsubscribe at any time.

Popular Products

The Lean Protein
Whey protein powder for weight-loss.
The Energy Booster
Pre/intra-workout powder with BCAAs.
The Glow Booster
Collagen supplement for skin.

The Best HIIT Exercises To Enhance Muscle Growth

2nd February 2023

2nd February 2023

By Beth Shelper

If muscle growth is your fitness goal, you’re in the right place. HIIT workouts are a great technique for burning fat whilst still maintaining and gaining muscle mass, hitting multiple goals at once. These workouts are great for toning up and increasing your stamina.

What are HIIT workouts?

HIIT (high intensity interval training) workouts are a method of exercise that prioritise speed and intensity. You may have heard of techniques such as Tabata, which breaks down these HIIT exercises into timed intervals.

People love HIIT workouts for their timeliness – due to their quick, intense nature, they’re great to squeeze in during a lunch break or before work. Train hard and fast for optimum results and we guarantee you’ll fall in love. The endorphins you feel after these techniques are next to none.

How do you promote muscle mass?

Put simply: more load = more gains. Promoting muscle growth is a delicate balance between diet, workout routine and appropriate recovery to avoid injury. Strike this balance, however, and you’ll be in the money.

 Muscle growth techniques

When it comes to exercise inspiration, there is a sea of information out there, so it’s important to find exercises that work for you and your specific fitness goals. The main thing to remember is that consistency is key; continue to challenge yourself and stick to your goals long-term. That’s when the best results will come!

Strength and resistance training

Strength and resistance are the key to building muscle mass. People regularly incorporate weights and resistance bands, which are elastic bands, often covered in fabric for the user's comfort, that are highly effective in training and promoting muscle growth. The bands were originally used for rehabilitation purposes until the effectiveness of this technique for muscle growth was noted.

Using weights

Depending on the specific muscles you are targeting, use of weights are the primary method to achieving muscle growth. Aside from this, free weights are a great, effective method in targeting growth. These are a really simple way to up your workout and increase your gains.

  • Arms: Dumbbell Curls

If you’re looking to increase the muscle growth in your arms, you want to target your triceps and biceps. These muscles are easily activated through the use of dumbbells – or if you’re working out from home, any item that provides weight. This could be a bottle of milk or maybe a brick, depending on your requirements and capabilities.

With a weight in each hand, stand with your feet shoulder-width apart with your arms down by your sides. Stand in front of a mirror if you can to ensure you are maintaining your form, and slowly curl the weights upwards towards your shoulders. Repeat to complete your set.

You can actually incorporate dumbbells into many of your favourite HIIT routines: burpees, push ups, mountain climbers – you name it. If you feel confident, add in some dumbbells and up the tempo to create a high intensity workout.

  • Legs: Weighted Squats

Leg day is a HIIT athletes’ favourite. Nothing compares to the burn you get after a good session. To target your lower body, we recommend you opt for squats and deadlifts. But for a HIIT workout, squats and pulse squats are your best friend.

Load the barbell with your desired weight or use the bar alone if you are just starting out – it’s usually around 20kg by itself! If you haven’t tried this before, try with a friend first and make sure you're happy with your form during a bodyweight squat before you continue any further.

Stand tall with your feet slightly wider than shoulder-width apart below the barbell. Make sure the space around you is clear to avoid any potential injuries, and get a good grip of your bar.

Bend your knees and hips simultaneously and lower yourself into the squatting position, and then return back to your standing, resting position. Keep your chin and chest up to maintain good form, helping to prevent injury. Repeat. We recommend three sets of twelve reps, but this entirely depends on your experience and capabilities as to how you implement these strength training exercises.

Top tip: add a resistance band around your thighs for some extra burn!

  • Abs: Medicine Ball Crunch

Get ready for some great strength training and the ab burn of your life. Sit on a flat, soft surface with your legs stretched out in front of you. Grab a medicine ball at a weight of your choice and lie down flat on your back with your arms stretched behind you.

In one, swift movement, bring your arms and feet together above you in the air. Hold it, and then slowly release, holding your core tight as you move. Repeat your reps and time your workout to the recommended Tabata protocol for a real HIIT burn. The aim of these workouts is to push your body to the limit with the intensity of your exercises. Here, you are trying to achieve MMF to maximise your muscle growth and results.

What is MMF?

Momentary Muscular Failure, or MMF, describes the state of your muscles following a high intensity and gruelling workout. This is the point that you reach when no more reps of your chosen exercise can be performed with perfect form due to the strain on your muscles.

Reaching MMF is an important step in continuing and maintaining muscle growth, as this state pushes your muscles to rip. Here, you are aiming to tire your muscles to create these tears, which speeds up your muscle gains (if adequate recovery is maintained).

Summary

HIIT workouts are a great time effective and goal-orientated fitness technique that can absolutely be incorporated to promote muscle growth. Whilst we’ve given you three examples, these definitely aren’t extensive – so if these aren’t for you, check out some more of our workout guides for inspiration. Pair these workouts and a healthy, balanced diet with The Power Booster and really reap the benefits and hit those fitness goals ASAP.

Product Spotlight

Need Expert Advice?

Other Insights

The Truth About Electrolytes
Electrolytes. You’ve seen the word plastered across sports drinks, hydration tablets, and wellness blogs. You know they have something to do with hydration and performance. But do you really need them? Or is this just another overhyped wellness trend? The Hard Truth About Hydration Most people think hydration is as simple as drinking enough water. Wrong. If you’ve ever felt exhausted despite drinking litres of water, struggled with brain fog, or suffered from muscle cramps and sluggish recovery after exercise, there’s a good chance you’re missing a key piece of the puzzle: electrolytes. Electrolytes are essential minerals like sodium, potassium, and magnesium that keep your body running smoothly. They: Regulate hydration – Helping your body absorb and retain water effectively. Boost performance – Ensuring muscles contract properly, nerves fire efficiently, and your body keeps up with demands. Reduce muscle cramps – Preventing painful spasms and fatigue caused by mineral depletion. Improve brain function – Supporting cognitive performance, reaction times, and mental clarity. Maintain pH balance – Keeping your body’s internal systems stable for overall well-being. But here’s the problem: when you don’t replenish electrolytes, your body feels it. Dehydration, fatigue, dizziness, and even impaired cognitive function can all stem from electrolyte imbalances. If you’re training hard, sweating, fasting, or simply not eating enough electrolyte-rich foods, you’re losing more minerals than you think. The Science of Electrolytes & Hydration Even mild dehydration affects brain function. Studies show that a 2% drop in hydration can impair memory, focus, and reaction time (Journal of the American College of Nutrition, 2019). Electrolytes prevent muscle cramps. Sodium, potassium, and magnesium imbalances are the biggest culprits behind muscle cramps and post-workout fatigue (Sports Medicine, 2021). Performance drops by up to 20% when you’re dehydrated. A 2020 study found that a 1-2% decrease in hydration levels can lead to a 10-20% decline in endurance and power output (European Journal of Applied Physiology, 2020). Water Alone Won’t Cut It A lot of people assume that staying hydrated is just about drinking more water. But here’s the problem—drinking too much water without electrolytes can actually make things worse. Overhydration (yes, that’s a thing) can dilute sodium levels in your blood, leading to hyponatremia. Symptoms range from headaches and dizziness to nausea, confusion, and in extreme cases, even life-threatening complications. That’s why professional athletes, marathon runners, and high performers don’t just drink plain water—they strategically replenish electrolytes to keep hydration levels balanced. How to Stay Properly Hydrated Want to make sure you’re actually hydrating your body the right way? Here’s how: Drink smarter, not just more. Hydration isn’t just about intake—it’s about absorption. Your body needs minerals to properly retain water. Eat water-rich foods. Cucumbers, watermelon, oranges, and leafy greens naturally contain electrolytes and help with hydration. Replenish electrolytes, especially after sweating. Whether you're working out, fasting, or in hot weather, your body needs sodium, potassium, and magnesium to maintain hydration and muscle function. Ditch sugary sports drinks. Many electrolyte drinks are loaded with sugar, artificial flavours, and unnecessary additives. Your body needs the right balance of minerals—not a sugar spike. Electrolytes & Everyday Life Think electrolytes are only for elite athletes? Think again. They play a vital role in daily life, too. Morning sluggishness? Your body loses electrolytes overnight. A small dose first thing in the morning boosts energy and mental clarity. Post-workout fatigue? Sweat = lost minerals. Replenishing prevents muscle cramps and aids recovery. Fasting or low-carb diets? When you reduce carbs, your body flushes more sodium and potassium—leading to fatigue and dizziness if you don’t replenish. After drinking alcohol? Alcohol is a diuretic, meaning it causes fluid and mineral loss, which is why you wake up dehydrated and groggy after a night out. Proper electrolyte replenishment before bed can help reduce hangovers. The Problem With Most Electrolyte Drinks The issue with many “electrolyte” products on the market? They don’t contain every electrolyte your bodies need or they contain electrolytes in super low concentrations so it’s more of a marketing gimmick than anything else. In addition, many are loaded with sugar and artificial ingredients including silica; an ingredient I despise and will be talking more about on our social channels. Most mainstream electrolyte drinks contain: Excess sugar – Leading to unnecessary calorie intake and blood sugar crashes. Artificial additives – Unnecessary chemicals that do more harm than good. Cheap mineral sources – Making them less effective at restoring balance. Your body deserves better. The Innermost Solution The Hydrate Blend – a science-backed, 100% natural electrolyte formula that’s free from silica, artificial ingredients, and sugar. It hydrates up to 5x more than water alone, making it perfect for everyday hydration and workouts. Unlike most sports drinks, it delivers every single electrolyte in the right balance without sugar or synthetic fillers. Whether you’re an athlete, a busy professional, or just trying to stay sharp and feel great, The Hydrate Blend helps you stay hydrated, recover faster, and perform at your best. Final Thoughts Hydration isn’t just about drinking more water—it’s about absorbing it effectively. If you’re constantly feeling tired, sluggish, or cramping up, chances are your electrolyte balance is off. So next time you feel off, don’t just chug another glass of water—make sure you’re replenishing the right minerals, too. Read more
From Couch to 21.1k: How to Train For A Half Marathon As a Beginner