Hye.
Usually you would decide to take creatine supplementation to improve workout. Now, it all depends on YOUR definition of "workout" Just because you join the gym and pick a few weights or you want to grow muscles or gain weight does not justify taking creatine supplementation.
Our body naturally creates creatine phosphate, and uses it as our "immediate energy system" This energy system is used during high-intensity, short duration bouts of exercises, such as: 40-100 meter sprint, first few reps of a power/heavy lift. In this case, taking a creatine supplement can benefit your intense training bouts, and help recovery in between sets. Creatine would help you with your cardio if and only if you were performing HIIT (High Intensity Interval Training), as this type of cardio requires high amounts of effort/energy, and utilizes glycolysis as well as your immediate (creatine phosphate) energy system. Creatine is designed to deliver more "pump" to the muscle thereby increasing muscular endurance. But mind you, just taking it to gain weight or taking it without the right type of "Workout" can lead to side effects. Creatine cannot be taken in isolation. The dosage and combinations depend on weight training and cardio workout intensity, basic intake, medical history and lifestyle.
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