Elite for my age: Walked one mile at 11:53

Elite for my age: Walked .50 miles at 5:05 Pace: 10:10

Yes, for a 57-year-old woman, walking one-half mile in 5:05 (a 10:10 per mile pace) is exceptionally fast and considered elite for a walking pace.

--Google AI Overview

Yes, a 1-mile walk time of 11:53 for a 57-year-old woman is considered a highly elite and competitive pace, likely placing you in the top 1% or higher for walkers in your age group.

--Google AI Overview

Part I: Warm-up exercises: Less than one minute

Part II: Speed: Increase initial speed from 3.0 to 3.9 at .01 miles at each change of speed

Time: 1:47

Distance .10 mi 

Part III: Speed: Increase initial speed from 4.0 to 4.9 at .01 miles at each change of speed 

Time: 1:23

Distance: .10 mi

Part III: Walk: 1st mile: Initial speed: 4.9

5.0 .50 mi

5.1 .75 m

5.3 .85 m

5.4 .92 mi

5.7-5.8 .94 mi

5.9-6.0 .96 mi

6.4-6.8 .98 mi to end of mile

Time: 11:55 for the 1st walk

I was able to walk through the entire mile without stopping.

Part IV: 2nd Walk: .50 mi: Initial speed: 5.9

5.9 .01-.35 mi

6.0-6.1 .35-.45 mi

6.2-6.5 .45-.50 mi

Time: 5:05

Pace: 10:10

I was able to walk through the entire half-mile without stopping.

Part IV: Videos: 

Allie Ostrander (Working Out at 8 min Mile Pace || Day in the Life) 

290 Pound Former NFL Player Runs 7-Minute Mile (Devon Still)

Part V: Jog: .50 mi Initial speed: 7.0

7.2 .20 mi

7.3 .25 mi

7.4 .28 mi

7.5 .30 mi

7.6 .40 mi

7.7 .45 mi

7.8-9.1 .47-.50 mi

Time: 4:10

Pace: 8.20

I stopped fewer times than the previous run closest to this distance.  I had problems with my stomach.

Part VI: Warm-down exercises: Less than one minute

True Treadmill