As in the 3 day workout program, you have the choice to take two days off for the weekend or to continue after only 1 day of rest. The disadvantage to only taking one day instead of the two day weekend it that it throws you off schedule for your next week (if that is important to you).
The reason why this routine is categorized as intermediate is because now that you have been training longer and you have become stronger in your lifts, you will need more rest to allow proper recuperation between bodyparts you trained in your workouts. You will backoff the frequency you train each muscle but you will increase your training day by 1. Once you have complete about 3-6 months of a 3 day routine, you can move up to this split to start seeing more muscle gains.
5 Day Split:
The 5 day split is the most advanced routine that I would recommend for anyone. Sure, there are routines that could make you train 7 days a week or even twice per day for a total of 14 workouts per week. But eventually the line has to be drawn and I draw it at 5 days per week for 99% of natural trainers.
After training for many years and developing your maximal strength and maximal growth, you may need to start to train using a 5 day split routine focusing on only 1-2 muscle groups per workout. When you train for more than 2 years or so, the strength gains experienced in the beginning (due to an adaptation in your central nervous system) due not occur at the same rate. You will reach a point where it will be very tough to add more weight in your lifts and/or even grow additional muscle.
Its not to say that you can't, it just becomes a lot harder. At this point, it is better to increase the volume trained on the muscle on the day you work it and allow a longer cycle for it to repair fully and to stimulate growth.
Starting Point Guidelines:
If you do not know what your starting point is, please refer to the guidelines below: Beginner: 6 months or less of weight training Intermediate: 6-18 months of weight training Advanced: 24 months or more of weight training consistently.
If you have trained on and off over many years but never consistently followed any program, then I would consider yourself to be intermediate, but you may even want to start as a beginner to condition your body for the higher volume training to come later on. Its your choice. Decide what your training level is and then choose a routine that best suits your individual requirements.
Be patient and focus on one thing at a time and you should start to progress through each routine and see some very impressive gains.
>> Click here for Joey Vaillancourt's Bones to Buff training program