Type IIa fibres are fast oxidative fibres. They are a hybrid of type I and II fibres. These muscle fibre types contain a large number of mitochondria and myoglobin, hence their red colour. They also manufacture and split ATP at a fast rate
Type IIa fibres are fast oxidative fibres. They are a hybrid of type I and II fibres. These muscle fibre types contain a large number of mitochondria and myoglobin, hence their red colour. They also manufacture and split ATP at a fast rate