Nike's trying to pivot. It's not working just yet.

• Nike's been having a tough time, with shares down more than 30% this year and sales set to fall.
• The sportswear brand has started implementing a turnaround plan, but the results are yet to be seen.
• Nike's reliance on its lifestyle business seems to be hurting it, one analyst said.

Nike's lost its stride — and is finding it hard to get its pace back up.