Thursday 8 January 2015

Cardio or Weights?


 An interesting question and one that tries to make sense of all the various fitness programmes that are out there – and all pertaining to be the “best” way to lose weight and/or get fit.

Let us examine both sides.  Cardio work usually involves lifting your heart rate between 55-85% of your maximum and sustaining this for around 20 minutes for optimal effect.  This type of training can be categorised as endurance work – although much of the effort put in will challenge what is called your “anaerobic threshold “ (where you get seriously out of breath) in peaks throughout your run/jog/bike/swim session. The benefit of this type of exercise is hugely important to fitness, with significant gains seen in the strength of the heart muscle, increased transportation of blood and oxygen through increased building of blood vessels, increased energy production through greater and more numerous cells called “mitochondria” that mean more work feels “easier”. It has great protective capabilities for the heart – not only by greater strength and resilience but also in the way that endurance work mops up “bad” cholesterol, keeps arteries “clean”, regulates insulin and helps with breathing problems.  These are all important considerations and it is easy to see why we should include some kind of cardio work into our daily routine. The key to successful cardio response is to be able to sustain a consistent pattern of training for about 20 mins. Current guidelines for health are30 mins per day in blocks of 5 mins, with one block being 15 mins – but to get gains in fitness (and health) then you need to get up to that 20min as a minimum, get breathless and repeat the process for 3-5 sessions per week.

Weights on the other hand, despite making you breathless, work in an entirely different manner.  Weight training is hugely important for bone strength, joint stability and posture, as well as its more pleasing aesthetic aspects of tone and shape. Weights can be split into both strength and endurance, with both elements significant for health and fitness.  By increasing the force and pressure on the muscles and bones, the body adapts and grows stronger. You can work an endurance based programme by including repeated lifting of one type of action for at least 15 times (reps) – this should feel within your comfort zone up until the last few repetitions where you should struggle to push with the same amount of ease and comfort. Please don’t be fooled into thinking that 15 reps is some kind of magic number – ideally, keep going until you can’t move the weight.  Strength and endurance gains occur most frequently within a range repetition of 8-15. At this point you will get significant changes to muscle mass and will see the most amount of muscle growth – more pronounced in males due to the effect of testosterone.  Lifting in the lower ranges of 2-7 reps is for those who have been training for some time and have good joint stability. This range of lifting gives excellent responses in what is known as the “neural drive” where the nervous system is primed to contract faster and with greater force – you will get fantastic strength gains here but without the bulking of the middle range – so a must for both sexes.  The benefits of weight training are tremendous. Not only do you protect your body, but it makes all tasks from housework to sports feel much easier. It will make you run faster, jumps higher, turn quicker and feel GOOD!!!  Recovery from weights is always fat burning, and this can be sustained for up to 2 hours after training leading to substantial weight loss.

The cons for both exercises are thus – in cardio you do not get the gains in improved posture, bone density, core stability and power that weight training gives you. In weights, you do not get the protective measures for your heart that is vital to sustained happy and healthy life. So basically, you need to do BOTH. You can bias your workout towards the elements that you like, but as a minimum, one weights or one long cardio session per week. x

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