Yes, yes it does.
Bill Bowerman, world famous running coach and co-founder of Nike, once said that if your stride is 6 feet, you take 800 strides in a mile, and if you remove 1oz from your shoe weight that equals 55lbs less that you have to lift over the mile (880oz = 55lbs).
Let me start by saying that the Nike Air Zoom Elite 8 was complete and utter garbage. It was supposed to be lightweight, responsive, and fast. It was heavy, bulky, and slow and I hated every minute I ran in them. So why then would I even consider buying the Nike Air Zoom Elite 9?
I'm a lazy runner. One of the reasons I run is that it's so easy to do. I roll out of bed, put on my running clothes, and I'm out the door exercising. I can do this in any city and in almost any weather. I don't love biking or swimming because of all the extra work involved in getting ready and the limitations of where and when they can be done.
I've had the displeasure of testing several wrist/optical heart rate monitors including those found on the Apple Watch and the Garmin Forerunner 235. I could go into detail and tell you how they only seem to work when you aren't doing anything physical, how they are terrible for running intervals, how they work ok some days and not at all other days, or how they magically seem to always add +10 to +20 BMP to your heart rate (+10 or +20 anything would be great if this was a video game).
I don't know if Chris Solinsky is a big fan of this video (former American record holder in the 10K) but I think it's great. It breaks down Chris' stride and tells you exactly what he does right (nothing) and what he does wrong (everything).