The final impact of sex on muscle building will be related to the level of your focus. Keeping the focus, both in the gym and out to the actual exercise session will be very important to see optimal results. In some extreme cases, if you become too fixated on sexual activity, you can prioritize it ahead of the regular training sessions, which will then have a huge impact on the overall results you experience.

Obviously this will be to the extreme and most people will have no trouble maintaining a normal balance between the two, but if you feel like you may be pushing the barrier between an unhealthy balance it is worthwhile to seriously consider.

For many people this will never be a problem as their training is directly tied to their desire to become more sexually attractive when they are training for the most part to look good for the members of the opposite sex. So by keeping up with their exercises regularly, they will help promote the possibility of sexual relations frequently.