James May

The bicycle might just be the greatest of all inventions. It empowers the human machine, and with no input beyond perhaps a trendy isotonic health drink in a brightly coloured bottle at an inflated price.

English Journalist

Understand that 'isotonic' involves a membrane that lets some things pass through, which is key in biology and chemistry.

Semipermeable Relevance

'Isotonic' signifies equal pressure, which prevents cells from swelling or shrinking.

Pressure Equilibrium

Don't confuse 'isotonic' with 'isotopic'; isotonic doesn't refer to energy or isotopes.

Not Energy Related

'Isotonic' in physiology involves muscles changing length during exercise, like when you bend your arm.

Muscle Movement

When muscles stay under steady tension while moving, that's an 'isotonic' contraction.

Constant Tension

'Isotonic' in exercise is not about something's tone or sound, but how muscles work under load.

Exercise Specific

The 'isotonic' in sports drinks means they're designed to quickly replace fluids and minerals.

Hydration Focus

'Isotonic' beverages help maintain the body's salt balance which is crucial after intense workouts.