- [Male] So before I had something to track me,

I had constantly struggled with weight loss my entire life.

So I've always been a heavy kid.

I tried losing weight, I'd cut stuff,

I'd go exercise but I'd always stop

and I'd always put it back on and sometimes

I'd put on more weight than when I started.

- So the series 4 Apple Watch has been out for about

a week now and while there's been a ton of heat

on the iPhone, I think the general consensus

is that the watch has been a hit.

We've seen it all over Apple keynotes,

those stories on how the watch saved a life,

how it impacted someone and I thought it'd be cool

to actually find someone like that.

Meet Gregory who lost 100 pounds using the Apple Watch.

- My starting weight was 280, I'm down to 175 now,

took about two years to get there but I maintained it,

ballooning a little here and there but maintaining 175

and still looking to get better though.

- Now for me, the biggest benefit of the Apple Watch

has always been that it encourages you to be active

because chances are, you are more than likely

less active than you think.

- I always though I moved around a lot

or more than the average person.

I think a lot of people like to overestimate how much

they're actually moving around.

So for me, when I got home and I saw that I only took

2000 steps, I was going oh man, and then you see

the calorie rings only 100 filled and you have

to burn 600 calories, it's a little disorientating.

At first I'd start going on walks, just short little walks,

15 minute walks on my breaks

and that would help fill the gap.

Eventually I just wanted to lose more

and start going more so I'd start walking home form work.

It would about be an hour walk and you get 10000,

15000 steps and after a while, I just got tired

of walking all the time, it took up a lot of time

so I jut started running and I picked it up from there,

started going 1/2 mile, mile, two mile

and then eventually 5k.

- So when is aw Gregory's story, it really motivated me.

I've been off the fitness game a little bit more

than I would have liked to admit lately so to see him go

from a mile to two miles to a 5k, I was like jeez,

he is completely outdoing me, I need to step my game up.

- I sent the tweet out, I sent a tweet sharing the video

that I actually had a hard time making telling people

about how I lost the weight because I did wanna share it

with my audience and let them know where I came from

and how heavy I was and how much I progressed

and it was important to me.

So at most, I was expecting a like.

All of sudden, I'm sitting at work and all of a sudden

I see a message and I'm like oh shoot.

(laughing) My heart rate's pumping up,

I couldn't handle it.

I can't believe I let myself get that heavy.

I barely recognize myself when I look at older photos

and sometimes people will say in my life

that you weren't that heavy and then I'll remind them

and I'll show 'em a photo and they go,

"Wow, that was you?"

I have a friend from college, Evan,

he lives in Massachusetts

and we haven't seen each other for a while

and we were sitting there and it's like the elephant

in the room, no one brings it up

and then we're sitting on a drive back home one day

and he goes, "Man, you lost a lot of weight, huh?"

If I could do it at 280, I think a lot of people can do it.

I'd say find something that works for you.

If it's an Apple Watch that can help you track your movement

or if it's something like a My Fitness Pal

that can track your calories, just try something,

start doing it everyday and keep at it.

- So with that, I thought it'd be awesome

to bring Gregory out to hangout and run with him,

see what he does on a day to day

because right now my cardio and endurance,

I'm gonna admit, is trash so Gregory is gonna kick my butt.

(upbeat music)

All right so we're about to kick off this run with Greg.

I'm a little worried that he's gonna kick my butt

but we'll see what happens.

I'm gona try to run two miles with him,

let's see how it goes.

Man so we're like six seconds in,

his pace though, I knew it was gonna kick my butt,

but he's just goin'.

Man so I'm bringing this pace down right now.

We're about a little under half a mile,

I'm breathin', I need a tea and he's just

chuggin' through it like a champ.

Man I got all the credit in the world.

Greg, I knew I was out of shape but holy crap,

this is like a

giant slap in the face like dude, you gotta run more.

Josh, he murdered me.

(laughing) Like destroyed me.

Like, I just go home after this.

Yo, so I was expecting this calm, peaceful jog,

you know, he's downplaying it the whole time,

it's no big deal, I just kind, I run for fun,

my pace isn't that fast, I say go.

- It's not that fast. - Dude, there's Blair Witch

footage of me trying to catch up to you

and you're just knee high running uphill

just booking it so...

Damn it, I'm sweatin' so much from Gregory,

this mic won't stay on.

If I didn't screw it up, you would have been going

the entire time? - Oh yeah, yeah.

You stopped a couple of times and I had to stop with you

to walk, I never stopped through my whole 5k.

I just go straight through.

He was telling me how it slows him down,

it makes him feel worse... - A little bit.

It's actually harder when you slow down.

Just keep going, get it over with.

- Oh man I feel so bad, I need to get my stuff together.

Either way though man, already from the get go,

100 pounds is an amazing accomplishment

so you should be so proud for that

but the endurance you've built up kind of blew my mind.

- Thank you.

- So everybody out there, mad props,

smash the like button for Gregory.

He also does some really awesome tech videos

on top of just being this boss human being.

So check him out, I need to get my stuff together

because good god, I'm out of shape.

Later.

- [Male] Bye Jimmy.

- I think everyone does the hey guys, this is...

- [Male] Do it again.

- Do it again? - Yeah, hey guys.

Hey guys.

I don't know.

- [Male] Hey guys, I lost 100 pounds.