A lot of people talk about working hard to achieve their goals, but I've heard just a few of them who recognize the importance of recreativeonal activities in their free time.

The human being can't handle very well really long periods of work or task completion well.

Otherwise, the standard 8 hour shift would prolong even morelast even longer, and people would be producing results for aworking for an even longer time.

Producing results is vague.

Those who attempt to do so, by working 12, 15 or moremore than 12 hours each day are sure to not last or; they may end up showing clear signs of burn out, which can derive inlead to more serious issues regarding their health.

Split for clarity.

It is a great way to take some rest ofa break from the usual tasks and helps go backone return refreshed at work later on.

This is what allows the proper reaching of goals andwhile minimizesing the side effects of thephysical and mental fatigue that accompanies getting work done.

Replaced side effects to be more specific.

A lot of people talk about working hard to achieve their goals, but I've heard just few of themvery few who recognize the importance of recreativeonal activities in their free time.

I'd also consider saying "hobbies" instead of recreational activities

The hHuman beings can't handle very well really long periods of work or task completionworking for long periods.

Otherwise, the standard 8 hour shift would prolong even morebe even longer, and people would be producing resultworking on tasks for a longer time.

Those who attempt to do so, by working 125, 15 or even more hours each day are sure to not last or show clear signs of burn out, which can derive incause more serious issues regarding their healthhealth issues.

Here lies the value of free time and leisure activities.

Great work

It is a great way to take some rest of theaway from your usual tasks, and helps you go back to work refreshed at work later on.

The balance between leisure activities and work schedules is therefore an aspect of great interesvery important.

This is what allows the proper reaching ofpeople to reach their goals, and minimizes the side effects of the work doneburnout.

A lot of people talk about working hard to achieve their goals, but I've heard just few of themof only a few who recognize the importance of recreativeonal activities in their free time.

The hHuman beings can't handle very well really long periods of work or task completion.

Otherwise, the standard 8 hour shift would probe long evener, and more and people would be producing results for a longer periods of time.

Those who attempt to do so, working 12, 15 or more hours each day are sure to not last, or will show clear signs of burn out, which can deriveresult in more serious issues regarding their health.

It is a great way to take some rest of thefrom usual tasks and helps go back refreshed at work later onyou return to work refreshed.

Thoughts on lLeisure aActivities

(Si vas a usar las reglas gramáticas estrictamente) usualmente los títulos en inglés tienen las letras mayúsculas al principio de cada palabra que no es una palabra conectiva (como the/of/and etc.)

A lot of people talk about working hard to achieve their goals, but I've heard just few of them who recognize the importance of recreativeonal activities in their free time.

No estoy seguro si 'recreative' es una palabra real 'recreational' suena más natural aquí

The hHuman beings can't handle very well really long periods of work or task completiong tasks very well.

No necesitas el artículo aquí o puedes decir 'The human body' si quisiera usar un artículo. No puedo describir bien por qué 'very well' parece mejor al final de la frase, ni por qué 'completing tasks' suena más natural que 'task completion', lo siento.

Otherwise, the standard 8 hour shift would prolong even morebe even longer and people would be producing results for a longer time.

Lo que dijiste no fue malo pero 'be even longer' es como lo dijiría.

Those who attempt to do so, working 12, 15 or more hours each day are sure to not last or show clear signs of burn out, which can deriveresult in more serious issues regarding their health.

Se usa 'derive' más en contextos de medicinas o comida. ¡Pero, no es incorrecto! Te recommiendo 'result' en este caso.

It is a great way to take some rest of thefrom your usual tasks and helps you to go back refreshed ato work later on.

Se usa 'from' en este contexto. También no necesitas usar el artículo pero necesitas hablar a alguien (si quisiera ser más formal, podría usar 'one'). Aunque 'a' se traduce a 'at' o 'to', en este caso, va a ser la traducción 'to'

This is what allows thesomeone to properly reaching of their goals and minimizes the side effects of the work done.

Lo que dijiste no fue incorrecto pero este es como lo dijiría.