By Petros Gil
Most gym-goers in Singapore face the same dilemma week after week. Do you hop on the treadmill for cardio, or do you head to the weights section for strength training? For decades, fitness culture treated these two goals as separate pursuits requiring separate sessions, separate programmes, and separate days. What if there was a smarter, more time-efficient way to achieve both simultaneously? That is precisely where the bodypump class delivers something that most standalone gym workouts simply cannot replicate.
This is not about cutting corners. The science behind concurrent training, which is the simultaneous development of cardiovascular fitness and muscular endurance, is well-established in exercise physiology research. BodyPump sits at the intersection of both, and understanding why it works the way it does can help you train smarter, recover better, and see results that neither pure cardio nor pure strength training alone can produce.
What Is Concurrent Training and Why Does It Matter
Concurrent training refers to combining endurance-based cardiovascular exercise with resistance training within the same programme or session. For years, researchers debated whether doing both at once would cause what is called the “interference effect,” where cardio blunts muscle gains and strength work limits aerobic improvement.
More recent research has refined this understanding significantly. The interference effect is most pronounced when high-volume endurance work, such as long-distance running, is combined with heavy maximal strength training. However, when the format involves moderate resistance with high repetitions in a structured, rhythmic format, the body adapts to both stimuli without significant compromise to either. This is the exact training zone that BodyPump operates within.
The class uses a barbell with adjustable weight plates across ten tracks, each targeting a specific muscle group. The repetition ranges are deliberately high, typically between 70 and 100 repetitions per track, performed at a tempo driven by music. This creates a unique physiological demand that forces both the cardiovascular system and the muscular system to work hard at the same time.
How BodyPump Elevates Your Heart Rate Into the Cardiovascular Training Zone
One of the most common misconceptions about resistance training is that it does not count as cardio. BodyPump challenges this directly. During a standard 55-minute class, participants consistently push their heart rate into the moderate to vigorous intensity zone, which is between 64 and 90 percent of maximum heart rate, depending on the weight selected and the individual’s fitness level.
This sustained elevation of heart rate over the course of a full class meets the cardiovascular training thresholds recommended by the World Health Organisation and the American College of Sports Medicine. It improves the heart’s stroke volume, which means the heart pumps more blood per beat over time. It also improves VO2 max, the body’s maximum capacity to consume oxygen during exercise, which is one of the strongest predictors of long-term health and longevity.
The rhythmic, music-driven format of BodyPump also plays a key role here. Research consistently shows that synchronising movement to music increases exercise intensity, reduces perceived exertion, and allows participants to sustain effort for longer periods. You push harder without feeling like you are pushing harder, which is a meaningful cardiovascular training advantage.
The Muscular Science: Why High Repetitions Build Real Strength
The weights room mythology that you need to lift heavy to build strength is not entirely wrong, but it is incomplete. Muscle adaptation occurs across a spectrum of loading conditions. Heavy loads with low repetitions primarily target type II fast-twitch muscle fibres and maximise mechanical tension. Lighter loads with very high repetitions, performed to fatigue, engage both type I slow-twitch and type II fast-twitch fibres through metabolic stress.
BodyPump deliberately trains in this high-repetition, moderate-load zone. Over the course of a single class, participants perform hundreds of repetitions across squats, deadlifts, chest presses, rows, lunges, shoulder presses, and core work. Each track takes a specific muscle group close to or into fatigue, which triggers the same fundamental muscle protein synthesis response that heavier training does, just through a different physiological pathway.
This is particularly important for muscular endurance, which is the ability of a muscle to sustain repeated contractions over time. Muscular endurance underpins everyday functional movement, from climbing stairs and carrying groceries to sitting at a desk for extended hours without postural collapse. BodyPump builds this capacity in a way that translates directly into daily life quality.
The Lactate Threshold Effect and Why It Changes Your Fitness
Another measurable physiological benefit of BodyPump’s concurrent training format is its impact on the lactate threshold. The lactate threshold is the exercise intensity at which lactic acid begins to accumulate in the blood faster than the body can clear it, causing that familiar burning sensation in working muscles.
Training consistently in the high-repetition, moderate-load zone pushes this threshold higher over time. This means your body becomes more efficient at clearing metabolic byproducts, allowing you to work harder for longer before fatigue sets in. In practical terms, this means everyday physical tasks become easier, recreational sports feel less demanding, and your capacity for both gym sessions and life outside the gym improves measurably.
Participants who attend BodyPump regularly over eight to twelve weeks often report that the class feels progressively more manageable even when they increase the weight on the bar. This is the lactate threshold adaptation expressing itself in real time.
Hormonal Responses: What Happens Inside Your Body During and After Class
The hormonal response to BodyPump is worth understanding because it directly influences body composition, recovery, and long-term training results. During the class itself, the body releases adrenaline and noradrenaline in response to the physical demand, raising heart rate and mobilising energy stores. Growth hormone is secreted in response to the metabolic stress of high-repetition resistance work, which supports muscle repair and fat metabolism in the hours following exercise.
Testosterone, which plays a role in muscle protein synthesis in both men and women, is also elevated transiently following resistance training. The combination of compound movements, which are exercises that work multiple joints and muscle groups simultaneously, with sustained cardiovascular effort creates a hormonal environment that is highly conducive to body recomposition over time.
Importantly, BodyPump’s moderate intensity means that cortisol, the stress hormone that can be counterproductive in very high volumes, remains within manageable ranges for most participants. This makes it a sustainable training format that the body can recover from consistently without the risk of hormonal disruption associated with chronic overtraining.
Who Benefits Most from This Combined Training Format
The concurrent training effect of BodyPump makes it particularly well suited for certain groups of people. Beginners benefit enormously because they do not need to master complex programming or split their gym time across multiple sessions. The class provides a complete stimulus in one structured hour.
Busy professionals in Singapore who can commit to two or three sessions per week find that BodyPump delivers cardiovascular and strength benefits that would otherwise require separate gym sessions on separate days. Time efficiency without training compromise is one of the format’s most underrated advantages.
Older adults also benefit significantly. The combination of cardiovascular conditioning and load-bearing resistance work supports heart health, bone density, and functional strength simultaneously, which is precisely the combination recommended by sports medicine professionals for healthy ageing.
Intermediate gym-goers looking to break through a plateau often find that adding BodyPump to their existing programme introduces a training stimulus their body has not previously encountered, producing new adaptation responses.
The Role of Progressive Overload Within the Class Format
A critical component of any effective training programme is progressive overload, the gradual increase in training demand that forces the body to continue adapting. Within BodyPump, progressive overload is built into the structure in two ways.
First, participants can increase the weight on the bar as their strength improves. The class is designed with multiple weight levels in mind, and instructors regularly guide participants on when and how to add load safely. Second, Les Mills updates the BodyPump programme every three months with new choreography and music, which means the movement patterns and muscle recruitment sequences change regularly, preventing the body from fully adapting to a static stimulus.
This built-in variation is one of the reasons regular BodyPump participants continue to see results over months and years rather than plateauing after the first few weeks.
FAQ
Q: How heavy should I go for my first BodyPump class? A: Start lighter than you think you need to. The repetition volumes are much higher than most people expect, and the goal in your first few sessions is to learn the movement patterns and understand the tempo. You can always add weight once your form is consistent.
Q: Will BodyPump make me bulky? A: No. The high-repetition, moderate-load format is not the training stimulus that produces significant muscle bulk. It builds lean muscle tone and endurance. Significant muscle bulk requires very heavy loads, high caloric surplus, and often years of dedicated hypertrophy training.
Q: How many times a week should I attend BodyPump to see results? A: Two to three sessions per week is the research-supported sweet spot for concurrent training adaptation. This allows adequate recovery between sessions while providing sufficient training frequency for cardiovascular and muscular improvement.
Q: Can I do BodyPump if I have never lifted weights before? A: Yes, and it is actually a good entry point for beginners. The group setting, instructor guidance, and structured format make it more accessible than a self-directed weights session. Start with a light bar and focus on form first.
Q: How long before I notice physical changes from attending BodyPump regularly? A: Most participants notice improvements in muscular endurance and cardiovascular capacity within three to four weeks. Visible body composition changes typically become apparent between six and twelve weeks, depending on consistency, nutrition, and individual physiology.
Q: Is BodyPump suitable for people with high blood pressure? A: People with hypertension should consult their doctor before starting any new exercise programme. In general, moderate resistance training with controlled breathing, which BodyPump encourages, can be beneficial for blood pressure management. Avoid breath-holding during exertion, and inform your instructor of any medical conditions before class.
