I need a logotype for a fitness clothing brand

I'm looking for a logotype for a fitness clothing label i'm looking to start called FST Apparel.

FST Apparel is fitness apparel brand for men and women who are into their strength and fitness training. They are young professionals who are image conscious, enjoy fitness and live a healthy lifestyle.

The logotype will need to be able to stand alone, work in a single colour (black) and be able to work alongside an already existing logo that will work by it's self.

I've attached the logo that the logotype will sit alongside.

The logo will be used for website, print and t-shirt print.

Ideally i'll have the moc ups done before the weekend and i'll make a final decision over the weekend if thats ok?