Here’s something from one of my upcoming article. It has not been edited yet so please disregard the grammatical errors!
"Frequency and volume of training
Functional training is a specialized form of motor learning. The key concept in motor learning is that frequency of practice is the most important determinant of success, not repetitions per se. It is better to do a low number of reps; very frequently than to do a lot of reps infrequently. For example, most elite Olympic lifters will perform between 5-20 total reps (warm-up not included) per exercise during a workout. During the competitive period, when they want to maximize performance they will perform only 5-10 total work reps on the competition lifts and maybe 10-15 total reps in the assistance exercises. However they will do this 6 times per week (sometimes more). This is motor learning at its best folks! Don’t do a lot of reps at any given time, the reps must be of high quality (quality in strength training equals high force production and proper technique) and you must repeat the process several times per week. However frequency and volume must be planned logically: if you perform 25 total reps of an exercise at each session (5 x 5 for example) you cannot repeat this workout 6 times during the week; 3 times will be the most you can do. On the other hand, if you perform only 5 total reps per exercise at each session (1 x 3, 1 x 1 or 1 x 5, or 5 x 1) it is possible to repeat the same exercise 4-6 times per week (but do vary the intensity from one session to the next). Ideally the weekly number of reps should vary between 30 and 75. The higher the intensity is, the lower the number of total reps per week.
For example, if your average weekly intensity is …
85-89% you can perform 60-75 total reps per week
90-94% you can perform 45-60 total reps per week
95-100% you can perform 30-45 total reps per week
Intensity of training and type of contractions
As it was mentioned above, motor learning requires high quality movements. In strength training quality refers to the amount of tension (and thus force) produced by the muscle (while quantity refers to the volume). Force being equal to mass times acceleration; you can have a high quality contraction either by:
- lifting a very heavy load (85-100%)
- lifting a moderate load at a relatively fast speed
- lifting a light load at a great speed
Depending on the physical quality you want to improve, one of these three methods will be best suited to you:
Limit strength gains = heavy loads
Strength-speed = moderate/fast
Speed-strength = light/explosive
While tempo training does have its place in structural training (as we will see later one) it really should not be the focal point of functional training.
Type of exercises
Complex motor tasks require a more important nervous system implication. Since with functional training we want to improve the capacity of the nervous system to solve motor tasks we need to use strength training exercises that are complex. Multi-joints exercises are the only way to go, isolation drills should be thrown out if you are strictly interested in functional gains. Some Swiss ball lovers will argue that unstable exercises are good for functional improvements because of the high level of complexity of these exercises. It’s true that they are complex from a motor standpoint; however since the potential of these exercises for strength, strength-speed and speed-strength improvement is very low (at best) I really do not consider them to be functional training in its truest sense.
Exercises such as squats, deadlifts, presses, cleans, snatches and chins are all prime choices.
Type of training split and number of exercises
If training only for functional gains only two splits are possible: whole-body training and an upper body/lower body split. This is because for best results each muscle must receive some stimulus 2-6 times per week. Two sessions per muscle groups is the bare minimum for functional gains, 3-4 being best in most cases. As a result it is impossible to train using a bodypart split, unless you have room to train 8-10 times per week.
Ideally you’ll want to limit each training session to 2-4 exercises. If you use a whole-body split (which I recommend for purely functional gains) only three can be used quite successfully. In that case you’ll want to include 1 upper body push exercise, 1 upper body pull exercise and one lower body exercise. You can even reduce the exercise number by using whole-body exercises such as the Olympic lifts."