Womens Newton Running Lady Isaac S Running Shoe at Road Runner Sports
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Womens Newton Running Lady Isaac S Running Shoe

Women's Newton Running Lady Isaac S

Item #NWT131

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Reviews (22)
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Product Description:

Women's NEWTON® RUNNING LADY ISAAC S :: Maintain more control of your run with the women's Newton® Running Sir Isaac S. Land smooth and stable through every step with tapered forefoot lugs and midfoot chassis. It's easy to transition from a heavy heel-strike running style to a more centered, natural position with Newton's unique beveled heel and toe design. Stay super cool with highly breathable mesh. 8.9ounces

Features & Benefits:

  • Beveled heel and toe: Helps guide runner easily into the midfoot/forefoot
  • Dual-density medial posting: Increase stability
  • Wider midfoot/forefoot and lugs: Adds stability and creates a softer feel
  • Midfoot Chassis/Shank: Adds support and stability
  • Carbon rubber outersole: Increases durability
  • Closed mesh on upper: Highly breathable, fast-drying, keeps small debris out
  • High rebound EVA: Stabilizes all foot types
Product NWT131 Review


Awesome for mid-foot strikers


I feel like a grasshopper when I run in these! Awesome, lightweight construction on a shoe which supports a mid-foot striker. It takes some getting used to after wearing ASICS with the built-up heels - almost feel like I'm wearing Earth Shoes or Skechers. Instead the build-up is in the forefoot where many of us actually strike the pavement. I run about 25 miles per week mostly on city streets and have run the gamut of foot, knee, arch, and hip problems. These take the pressure off my hips, saving my energy for the run instead of the pain.




I AM IN LOVE !!!!!!!!!!!!!!!!!!!


I have ran in, New Balance, Nike, Mizunos and Brooks. Mizunos performance stability shoes are my favorite. but they wear quickly well they lasted me 4 months. Then I switched to Brooks Adrenaline 13 because I was having shin splint issues and these worked well for my husband so I tried them for 4 months. My shinsplints got worse. So I had been reading about the Newtons and a friend of mine has ran in them for at least two years ... Well ordered the Lady Issac S and I am in love with this shoe. it takes a bit to get use to but after that. I feel like I am a running machine... I think I may have found my running shoe.


Vicenza, Italy




I wanted something more lightweight to run/race in from the Nike Zoom Structure I had been wearing previously. I also wanted something that might help me correct my heelstrike. This shoe still has a bit of the pronation support I needed from the Nikes, but with a much more light profile. The "lugs" that line the midpoint of the shoe's sole really have done wonders to help shorten my stride and move my strike from heel to mid/forefoot. The difference obviously takes some getting used to; the instructions even recommend short/slow runs for the first two weeks you have them. But, I cannot recommend these enough! They are worth every penny.


Harrisburg, PA


Efficiency = I. Am. Fast!


When I would get tired during training, my college coach would yell all the adjustments I needed to make to my form in order to become more efficient, run faster and feel less tired. It's been many many years since I've had a coach, yet when I wear these Newtons, it's as if my form is awakened and I come alive! I. Run. Fast! And ooooh that feels good! Beware of sore calves and achilles post workout. Compression sleeves are a must for recovery for new Newton runners!

The Falcon

Thousand Oaks, CA




Have found that Lady Issac is the best Newton for me due to stability. Been running in these for 2 years. RR has not been clear about availability on these shoes... contacted Newton and new Lady Issac S coming out in May. Not sure if RR is selling out the last of these white/teal shoes even though the description is new??? I really want to order these again but always on backorder or emailed discontinued?????


Monterey, CA


Best running shoes so far


My feet are very hard to fit, narrow, bunions, high archs, and there are very few running shoes I can wear without some pain. The Newtons keep me pain free and able to walk/jog 3.5 miles six days a week. They are lightweight, provide great impact cushion and the forefoot lugs engage different muscles that other shoes don't. Would highly recommend.

Eva Brooke's Mama

Atlanta, GA


so far so good


I am still in the manufacturer's recommended break in period to adjust to the new sole configuration but after 6 short runs (about 1.5 miles each) I really like them. The change in my running form has really helped with heel concussion. I move up to 2 miles tomorrow and am looking forward to running a 5k in them on 5/5.


Anaheim, CA


Great Shoes


Have been running in minimalist shoes for a few years and have noticed as I've gotten older my feet started to hurt. I decided to try these. LOVE them. They are perfect for my footfall. I have not had an adjustment period at all and have been able to increase my time and mileage. Very happy!


Cape Cod MA


Don't buy these


I run about 25-30 miles a week and have been wearing Saucony for several years. I wanted to try something new. Within 2 minutes my toes were in pain and literally numb. I wanted to finish my 6 mile run but couldnt wait to take these off. Perhaps I just like the heel to toe ride of the Saucony. The fit of the Saucony with a wider toe box is better as well.


New York


You will never wear another running shoe


Once you wear the Lady Isaac S, you will never be satisfied with any other brand or style of running shoe. Nothing else compares! Daily training, racing, treadmill, track, pavement, wherever you run, this shoe will get you there fast and pain free!


Rockdale, Texas


Newtons keep me running!


Until I discovered Newtons, I was dealing with shin splints and various other injuries. I've learned to become a midfoot runner because of the lugs on the soles, and I love the fact that I got around 450 miles out of my last pair!


Gettysburg, PA


Love at first sight


Over the years I have tried many different running shoes but none like the Newtons. Great for motion control and stability. My knees appreciate the purchasing of these shoes.


Menands, NY


my new love


I use for my runs on pavement. I have been suffering from an injury for over a year now. Newtons are slowly getting me back on track!


naples, florida


Love theses shoes


I love this shoe. I had a heel spur and these shoes have been great. I have 2half marathons with these shoes. No pain. Feet felt great.


Umatilla, FL




Love this shoe! Wears comfortable during all my runs. Was scared tap end this much on a shoe but I'm so glad I did


Aurora, CO


Have had 4 pairs now! Love them!!


I love these shoes!! Been running in them for a couple years now...on my 4th pair.

Marathon Mommy

Maple Valley, WA


Transformative running experience


Running faster, longer with no foot or shin splint pain. Game changer for me!


New Jersey


Pretty good


I like the fit and my feet and knees don't hurt, but they make me feel slow.

Jen from the beach

Chesapeake Beach, md


Best purchase ever!!


Really good shoe. I think newton may have developed brand loyalty.






These are truley B width- WIDE foot discrimination Newton!!!

Runner on swimmer feet

Seattle WA


Good buy


Good shoes type for natural running




STILL have not received my order!!!!!!!!


great for heel striking


Palo Alto, CA

Womens Newton Running Lady Isaac S Running Shoe

4.5 22


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  • Deep heel cup: Features the widest and deepest heel cup that offers maximum support and positions the soft tissue to help with natural shock absorption
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