Building muscle (myohypertrophy) has very little to do with oxidative capabilities, in general (yes, muscle is directly related to metabolic activity typically of carbohydrates and protein, which is why I said in general). Triglycerides must be broken down from adipose tissue-lipolysis, then enters plasma and is continued to b-oxidation and eventually is converted to acetyl-coa and enters the TCA cycle in active skeletal muscles, not surrounding muscle (for simplicity). To increase lipid metabolism, one would need to increase capillary beds and mitochondria (where lipid oxidation occurs) leading to and within a muscle cell.