The Fittux Journal for Fitness & Outdoor Performance

Why Is Running on a Treadmill So Much Harder? - Fittux

Why Is Running on a Treadmill So Much Harder?

Running on a treadmill feels harder than running outside for most people. This in-depth guide explains the mechanics, mental load, pacing demands, and how to make treadmill training feel smoother,...

Why Is Running on a Treadmill So Much Harder?

Running on a treadmill feels harder than running outside for most people. This in-depth guide explains the mechanics, mental load, pacing demands, and how to make treadmill training feel smoother,...

What Time Do Gyms Get Less Busy? UK Quiet Hours Explained - Fittux

What Time Do Gyms Get Less Busy? UK Quiet Hours...

Wondering when gyms are least busy? Find the quietest times in the UK, avoid peak hours, and plan sessions with full access to equipment.

What Time Do Gyms Get Less Busy? UK Quiet Hours...

Wondering when gyms are least busy? Find the quietest times in the UK, avoid peak hours, and plan sessions with full access to equipment.

How Much Should I Bicep Curl for My Weight in Kg? Calculator - Fittux

How Much Should I Bicep Curl for My Weight in K...

Wondering how many kg is a good bicep curl? Discover realistic strength standards, strict form guidance, key variations, and use our calculator to find your true 1 rep max.

How Much Should I Bicep Curl for My Weight in K...

Wondering how many kg is a good bicep curl? Discover realistic strength standards, strict form guidance, key variations, and use our calculator to find your true 1 rep max.

How to Fix Side Stitches When Running? - Fittux

How to Fix Side Stitches When Running?

Side stitches can ruin a run, but understanding what causes them—and how to prevent them—makes them easy to manage. Here’s how to stop them quickly and avoid them long-term.

How to Fix Side Stitches When Running?

Side stitches can ruin a run, but understanding what causes them—and how to prevent them—makes them easy to manage. Here’s how to stop them quickly and avoid them long-term.

How Long Should I Rest Between Sets to Build Muscle? - Fittux

How Long Should I Rest Between Sets to Build Mu...

Rest between sets shapes your strength and muscle gains. Here’s how to choose the right rest time, set count and weekly volume for building size, strength and endurance effectively.

How Long Should I Rest Between Sets to Build Mu...

Rest between sets shapes your strength and muscle gains. Here’s how to choose the right rest time, set count and weekly volume for building size, strength and endurance effectively.

Why Are My Muscles So Shaky When I Work Out? - Fittux

Why Are My Muscles So Shaky When I Work Out?

Muscles shaking during exercise is normal. Here’s why it happens, what it means for strength and fatigue, and how to reduce twitching while training harder.

Why Are My Muscles So Shaky When I Work Out?

Muscles shaking during exercise is normal. Here’s why it happens, what it means for strength and fatigue, and how to reduce twitching while training harder.

Performance Standards, Training & Exploration

The Fittux Journal is your structured resource for fitness, sport and performance. We cover strength standards, race benchmarks, endurance pacing, hybrid competition formats and practical nutrition guidance that supports real-world training.


Whether you’re building toward a faster 5K, lowering your half marathon time, improving strength under fatigue or preparing for sport events such as HYROX, Tough Mudder or structured hybrid races, you’ll find clear, measurable guidance here.


Our articles break down practical performance questions — from defining a good half marathon time to fuelling properly for endurance efforts. We provide race pace calculators, strength reference points and structured training frameworks designed to replace guesswork with progression.


For outdoor athletes, we explore conditioning strategies for hiking and unpredictable terrain. For those focused on nutrition, we examine recovery, protein intake and sustainable fuelling habits that support long-term development rather than short-term hype.


Performance extends beyond numbers. We also share practical gear insights — breathable training apparel, durable outer layers and everyday essentials that support consistent output across training and sport.


Whether you’re chasing a new personal best, building aerobic depth, refining your nutrition or developing strength that translates beyond the gym floor, the Fittux Journal delivers disciplined guidance without noise.