help on 50 free please

@SolarEnergy: I am still 16 years old and i am not a masters swimmer or something and i have never done weights. I still think that the problem that you seem to have completing a 50m may be related to a combination of heavy muscle *blood rush* along with a severe acidosis which prevents your from maintaining proper stroke mechanics at the end of your event. Given your age? I'd simply say don't focus on the 50 for now. You are already gifted on this aspect. Pay more attention to the 100 and your 50 should improve (at least the end of it). Also, if my assumption regarding muscle blood rush is true, then near the end your muscles are getting inflated and stiff. If it's the case then you got to improve the Stretching aspect. Now you may be wondering "Hey solar! I want to be good in competitive swimming not figure swimming". Well I'd answer that very comprehensive and thorough stretching is an activity in which every single high level swimmer is getting tightly committed. Stretch these upper body muscles to the extent that some flexibility remain even if your muscles are inflated with blood (end of your races). Typically, from the days I used to coach to a high level, the team would: - Stretch - Perform tubing exercises and Vasa swim (swim bench) exercises - Perform medicine ball exercises prior to every evening session + the Saturday morning session I don't know you at all, but given your statement of the facts, your age, your potential, if you don't pay a lot of care to stretch I am pretty sure that your bottleneck is right there. *note* in case it's not clear enough, body builders know very well about *blood rush* phenomenon. It occurs during and shortly after any gym session. They look at themselves in a mirror and see their muscle mass being bigger (in volume) than usual. Since it's all due to more blood being stored in the muscle, the muscle becomes rigid and loose a lot of its flexibility. For a body builder? no problem. For a sprinter, that has a detrimental impact on technique. Acidosis is a phenomenon that occurs when blood ph is dropping along with an increase in lactic acid. That probably occurs to you more than in some of your mates due to presumed outstanding anaerobic power metabolism. The higher the rate of your anaerobic metabolism (ability to burn sugar as energy) the higher the level of acidosis (that's the price to pay if you may). Your ability to finish your races will improve along with the ability your system has to buffer (use or get rid) of the substances causing the acidosis. And that will occur more rapidly (one thing in your post is that you mention about 4months for reaching a goal) while exercising over longer distances (100m). By doing so, you allow more time to your system to learn to handle this situation, and the slow down will defer. That along with stretching should bring massive improvement over 50m.

@SolarEnergy: I am still 16 years old and i am not a masters swimmer or something and i have never done weights. I still think that the problem that you seem to have completing a 50m may be related to a combination of heavy muscle *blood rush* along with a severe acidosis which prevents your from maintaining proper stroke mechanics at the end of your event. Given your age? I'd simply say don't focus on the 50 for now. You are already gifted on this aspect. Pay more attention to the 100 and your 50 should improve (at least the end of it). Also, if my assumption regarding muscle blood rush is true, then near the end your muscles are getting inflated and stiff. If it's the case then you got to improve the Stretching aspect. Now you may be wondering "Hey solar! I want to be good in competitive swimming not figure swimming". Well I'd answer that very comprehensive and thorough stretching is an activity in which every single high level swimmer is getting tightly committed. Stretch these upper body muscles to the extent that some flexibility remain even if your muscles are inflated with blood (end of your races). Typically, from the days I used to coach to a high level, the team would: - Stretch - Perform tubing exercises and Vasa swim (swim bench) exercises - Perform medicine ball exercises prior to every evening session + the Saturday morning session I don't know you at all, but given your statement of the facts, your age, your potential, if you don't pay a lot of care to stretch I am pretty sure that your bottleneck is right there. *note* in case it's not clear enough, body builders know very well about *blood rush* phenomenon. It occurs during and shortly after any gym session. They look at themselves in a mirror and see their muscle mass being bigger (in volume) than usual. Since it's all due to more blood being stored in the muscle, the muscle becomes rigid and loose a lot of its flexibility. For a body builder? no problem. For a sprinter, that has a detrimental impact on technique. Acidosis is a phenomenon that occurs when blood ph is dropping along with an increase in lactic acid. That probably occurs to you more than in some of your mates due to presumed outstanding anaerobic power metabolism. The higher the rate of your anaerobic metabolism (ability to burn sugar as energy) the higher the level of acidosis (that's the price to pay if you may). Your ability to finish your races will improve along with the ability your system has to buffer (use or get rid) of the substances causing the acidosis. And that will occur more rapidly (one thing in your post is that you mention about 4months for reaching a goal) while exercising over longer distances (100m). By doing so, you allow more time to your system to learn to handle this situation, and the slow down will defer. That along with stretching should bring massive improvement over 50m.