Some definitions:
In physiology, medicine, and anatomy, muscle tone (aka residual muscle tension or tonus) is the continuous and passive partial contraction of the muscles. It helps maintain posture, and it declines during REM sleep.
Toning exercises are physical exercises that aim to develop musculature that is hard, as opposed to flaccid.
Performing such exercises can be referred to as toning.
In this respect, the term toned implies leanness in the body, low levels of body fat, and noticeable muscle definition and shape.
The concept of muscle building may refer to the expected effects of such exercises.
Many bodybuilders and experts argue that there is no such thing as a toning exercise.
What is referred to as toning actually consists of two effects: increased muscle size through hypertrophy and lower bodyfat percent.
Combined, these create the effect mistakenly called toning.
Why I am so opposed to the use of the word toning, is that the majority of women who use the word 'tone' do not consider that it has anything to due with building muscle.
If they do think that muscle tone is involved, then the weight training involved is often the 'pink dumbell' type, often one set of really high reps.
I would say that eight times out of ten when I see women doing this in the gym, they could have gotten a better workout by either carrying their groceries home from the shops or lifting and carrying a baby or small child for the day.
Really, they are wasting their time on pec dec machines, butt blasters, abdominal machines, jumping from machine to machine for an hour, or doing endless amounts of cardio in an attempt to get the body they will be happy with.
I would just like to put an end to this waste of time, most women don't have time to waste, and they don't need to spend needless hours in the gym if they learn how to train with the full on intensity required to build muscle aka=tone.
Yes, some may have to start with pink dumbells as a lot of women don't have upper body strength, but to carry on this way for months and months and then be disappointed with the results and give up on it.
Honestly ladies, it is SO DIFFICULT for women to build any decent amount of muscle, and you start to lose it at a much more rapid rate at about 30.
All of this leads to the dreaded 'middle age spread', which doesn't have to happen with a bit of diligence and consistency in your approach to training and fitness.