Freedive HK AIDA 2 DYN Complete Guide: One Pool Session vs Unlimited Practice Opportunities

Most AIDA 2 courses in Hong Kong schedule just one pool session for DYN training. For some students that's barely enough to get through — for most, it isn't enough to reach the standard the course actually expects. This post walks you through every part of a DYN session and shows you exactly why we structure things differently.

AIDA 2 DYN Requirements

• Dynamic Apnea Bi-Fin (DYNB): 40 metres

• Static Apnea (STA): 2 minutes

• Constant Weight Bi-Fin (CWTB): 12 metres

• Online theory exam: 75% pass mark

  
  

The requirements look straightforward on paper. The challenge is that a single pool session needs to cover all of the following — and for most students, one session simply isn't enough time to do it properly.

Before You Arrive: Food and Energy

Most people overlook this, but it has a significant impact on your DYN performance.

• Morning session: Light, easily digestible food (fruit, energy bar). Energy drinks are fine. Avoid heavy meals — a full stomach makes breath-holding significantly harder.

• Afternoon session: Full breakfast early in the morning, no lunch, energy drinks are fine.

• The night before: No alcohol. Get proper sleep.

Most pool-based DYN courses in Hong Kong run on weekday evenings. Even desk work consumes around 25% of your daily energy through brain activity. By the time you finish work, your body is more fatigued than you realise — and fatigue is DYN's biggest enemy.

Our DYN sessions run on weekend mornings. You arrive with the best energy and mental state you have all week.

What Happens In A DYN Session

First time in open water? We put safety first.

DYN training takes place in a calm, confined water near Clear Water Bay. For many first-time ocean students, an unfamiliar environment adds unnecessary stress — so we chose this location deliberately:

• Stand-up depth for STA: The STA practice area is very shallow — you can touch the bottom and stand up at any time. No need to worry about losing support.

• Clear visibility for DYN: The DYN practice area is around 2 metres deep, calm and enclosed, with your instructor supervising throughout.

• Private boat direct to the site: No carrying heavy gear uphill. The boat takes you directly from the pier to the training bay — so you save your energy for the water.

① Static Apnea (STA) — 2 Minutes

STA is the first element of every DYN session. The assessment requires a 2-minute horizontal breath-hold at the surface. At the same time, the instructor must teach Buddy Safety — the most important safety foundation in freediving. This cannot be rushed.

In a single pool session, some students don't pass STA first time due to nerves or fatigue, and Buddy Safety teaching often gets shortchanged due to time pressure.

✅ Our approach: Unlimited STA retries, no retake fees. More importantly, we give every student enough time to build genuine, strong safety awareness in Buddy Safety — not just run through the motions.

② Weight (Ballast) Adjustment

Getting your weighting right is just as important as your streamline position. Perfect neutral buoyancy means you don't need to actively kick against resistance — the entire dive becomes a fundamentally different experience.

But weighting is personal and changes with different equipment. Getting it exactly right on the first session is almost impossible. Settling for "close enough" under time pressure means students never feel the qualitative difference that perfect weighting creates.

✅ Our approach: We carry a full range of weights on site, all included in the course fee. Students can fine-tune across multiple sessions until they find their perfect balance.

③ Dynamic Apnea Bi-Fin (DYNB) — 40 Metres

The goal of DYN is: upper body in streamlined position, steady bi-fin kick below, gliding relaxed through the full 40 metres. The full sequence is:

• Duck dive entry

• Upper body streamline + bi-fin kick

• Turn technique

• Complete the full 40 metres

Most students push through on willpower their first attempt rather than relaxed technique. That's completely normal — DYN takes repetition to do properly. The problem is that a single pool session usually gives you 1–2 attempts, with no time for the instructor to make real-time adjustments.

✅ Our approach: Students complete DYN to assessment standard, then can continue with additional sessions to keep refining technique — not just get through it on willpower. No attempt limits, no retake fees.

One Pool Session vs Freedive Hong Kong

	🏊Typical HK pool course	🌊Freedive Hong Kong
Session timing	Weekday evenings, body and mind depleted	Weekend mornings, full energy, flexible timing
Training location	Chlorinated lane pool	Calm enclosed bay — STA at stand-up depth, DYN at ~2m
Equipment	Bring your own or rent separately	All included, ready on the private boat
STA	Limited attempts, nerves + fatigue	Unlimited retries, no retake fee
Buddy Safety	Rushed under time pressure	Proper time to build strong safety awareness
Weight adjustment	Limited time and options	Full range, fine-tune across multiple sessions
DYN Bi-fining	1–2 attempts, willpower	Unlimited retries, continue adjusting with instructor
Retake fees	Extra charges per session	All included, no limits

Why We Train in a Calm Bay

AIDA International accepts any "Confined Water" for DYN training — defined as calm surface, good visibility, controlled environment. A calm bay fully meets this. Pools are valid for competition and advanced training — but for beginner AIDA 2 students, pool training is simply Hong Kong industry habit, not an AIDA requirement. Many well-known overseas freediving schools have always trained beginner DYN in calm bays or lakes — this is standard practice internationally.

We chose the bay: weekend mornings, natural calm water, all equipment on the private boat, 1-to-3 small classes — every detail designed so students learn in the best possible state.

The Bottom Line

Every element of a DYN session — STA, Buddy Safety, weight adjustment, 40m DYN — needs time and repetition to do properly. A single pool session might let you push through on willpower. But that's not the same as actually getting it right.

We want every student to leave the course streamlined, perfectly weighted, with strong Buddy Safety awareness and a relaxed DYN — not just having survived 40 metres on willpower.

If you have any questions, feel free to WhatsApp +852 92031676 or email info@freedive.hk.