Table 6.

The 20 keywords in the cooccurrence frequency analysis.

Rank	Keywords	Count	BC	Rank	Keywords	Count	BC
1	Mitochondrial biogenesis	385	0.23	11	Mechanism	81	0.00
2	Skeletal muscle	269	0.40	12	Protein	75	0.04
3	Oxidative stress	259	0.38	13	Apoptosis	58	0.00
4	Gene expression	238	0.17	14	Nitric oxide	56	0.00
5	PGC-1 alpha	177	0.21	15	Transcription	52	0.00
6	Dysfunction	169	0.04	16	Coactivator	50	0.00
7	Activation	166	0.43	17	Exercise	50	0.09
8	Metabolism	164	0.13	18	Transcription factor	49	0.10
9	Activated protein kinase	94	0.77	19	Cell	48	0.00
10	Insulin resistance	83	0.17	20	Disease	44	0.00