Educational Blog
Muscle one of the strongest predictors of healthy aging
Research consistently shows that muscle strength and cardiovascular fitness (VO₂ max) are two of the best predictors of how long and how well we live. Why? Because they reflect how well your muscles, heart, lungs, and nervous system work together.
Exercising While Injured: How Myokines Can Boost Recovery
Have you ever been injured or felt tenderness in a joint or muscle? Every injury sets you back, and it can feel like you have to stop all activity just to recover. Often, a week of injury leads to all desk work and no body work.
But what if you could exercise safely without aggravating the injured area—and even improve recovery?
Strength Training and Sarcopenia
As life expectancy rises, one of the greatest challenges isn’t just living longer, but living stronger. Among older adults, sarcopenia—the age-related loss of muscle mass and strength—affects roughly 10–16% of people worldwide. This condition impacts mobility, independence, and overall health, increasing the risk of falls, frailty, and even cognitive decline.
The Guiding Principle of Safe Strength Training
First, do no harm” isn’t just a medical maxim—it’s the cornerstone of our approach to exercise and strength training at Salus Strength. This principle guides how we design every program, both for our clients and ourselves.
4 Strength Training Myths Debunked
There are persistent myths that prevent many people from participating in resistance training. Here are four of the most common misconceptions we hear each week—and what science actually says.
Single vs Multiple Sets in Strength Training
New research shows single-set strength training to failure is highly effective, even for advanced lifters. Learn how it compares to multiple sets.
Nutrition for Fat Loss and Muscle Gain
Learn how to lose fat or build muscle with simple nutrition strategies. Avoid food guilt, create balance, and focus on what truly drives results.
How Strength Training Recruits Fast and Slow Twitch Fibres
Forget what you thought you knew about "fast" and "slow" twitch fibres– the real story is about how becoming "weaker" during a workout can actually make you stronger.
Your Secret Weapon for Long-Term Health
The individual who performs the high-intensity training will be the one who gets the benefit of glycogen depletion and reloading, while the one performing the lower-intensity, more frequent steady-state work is at far greater risk for cardiovascular disease, particularly conditions resulting from increased cholesterol levels.
New Study: Unsupervised Trainees Don’t Train Hard Enough!
Supervision during resistance training (RT) has long been believed to enhance strength gains by optimizing trainee effort. But how significant is this effect?
7 Fundamentals of High-Intensity Resistance Training
Whether you're a beginner or an experienced lifter, understanding the seven fundamentals of HIT can help you maximize your workouts.
The Issue of Specificity in Strength Training.
Skill development is highly specific, and performing resistance exercises that superficially resemble sporting movements does not necessarily enhance sports performance.
Why going slower is better.
A weekly session of intense eccentric exercise (slowing the lowering phase down of a repetition) has been found to significantly enhance metabolic health markers.
How to Stay on Track with Your Exercise.
Have you ever noticed that your motivation fades as the day goes on?
Lifting Heavy is Essential for Postmenopausal Women.
A study published in the Journal of Sport Sciences for Health evaluated the effectiveness of different resistance training (RT) protocols on body recomposition and physical performance in postmenopausal women.
Is It Aging or Inactivity?
Research shows that lifestyle factors, particularly physical activity (PA) and exercise, play a significant role in influencing how we age.
7 Crucial Things to Know Before Your Next Workout
By focusing on these principles, you'll optimize your workouts and make meaningful strides toward your fitness goals.
Aerobic vs Anaerobic
You’ve heard it before: cardio is for endurance, and weights are for strength. But what if that’s not the whole truth?
Media Appearances
How to start exercising and how to do it from home - The Little Things Podcast | NZ Herald.
“Getting into exercise when you haven’t gone to the gym or been for a run for years can be pretty daunting.
But finding some simple exercises to do at home can be the easiest way to get back into a rhythm.
Kyra Seiler is an Auckland-based personal trainer who specialises in high-intensity strength training, and is soon to complete her Master’s in strength and conditioning.”
How High-Intensity Training (HIT) Helps With Injuries Caused By CrossFit
Salus Strength Founder Kyra Seiler talks about how she helps clients with their CrossFit injuries using high-intensity training (HIT) workouts and get them in the best shape of their life.

