Free-to-play Constitution training

Introduction
Firstly, here is an introduction of hitpoint in F2P world. Hitpoint, of course, is the measurement of endurance and capacity of a player before having to retreat or even fall down during combat or adverse conditions, like being chased by revenants. Hitpoint experience is gained in all combat involving actual damage to the target. Strictly speaking, for every damage dealt by either melee, ranged or magic, 1.333 or 4/3 experience is gained. Then only variation for fighting power not involving hitpoint at all is curse spells and prayer. Hitpoint, unlike most of the skills, are neglected and trained against to ensuring a low combat level with high combat abilities. These players do not really aim for decreasing the hitpoint level but other combat stats, thus low hitpoint level is only a result of it. However, even pures would have slight difference about their hitpoint level regarding their fighting methods, which is mainly caused by use of magic spells and unbalance of combat skills.

There is no quest that increase hitpoint experience in F2P world, but some quests increasing combat stats, meaning completing the quests would decrease the hitpoint level for that combat level.

Combat level and hitpoint
According to the article Combat level, a formula is available for calculation of combat level: Which can be rewritten as:


 * This table indicates several important things:
 * Defense, prayer and hitpoint level are always taken into account for calculation of combat level. A pure should avoid training defense and prayer.
 * Approximately, attaining 43 prayer for Protect from melee costs 5.375 combat level increase.
 * If the total level of Attack and Strength are equal, Melee combat level is not affected. This gives rise of variation of hitpoint XP with identical combat level.
 * Approximately, attaining 40 defense for rune armor costs 10 combat level increase. This also gives 12408 hitpoint XP.
 * The rating factor of Attack plus Strength, Ranged, Magic is 2:3:3, Maximum hitpoint experience can be obtained if the ratio of respective levels 3:2:2 is attained, which causes the lowest combat level available with the highest total individual combat stat levels.

List of ascending hitpoint of players

 * Magic pure
 * Magic-2h hybrid
 * Strength pure
 * Melee-magic hybrid
 * Ranged pure
 * 1 strength melee pure
 * 1 strength melee-magic hybrid
 * Ranged-2h hybrid
 * 1 Defense pure

Combat skills with magic as main
As result of training magic purely, the hitpoint, defense and prayer level should be untrained. These three skills are independent of attacker skills, thus the combat level will be kept very low. Attack, strength and ranged should be carefully trained, probably by completing Vampire Slayer and using antique lamps to earn experience, in order to incur as little hitpoint XP as possible.

Combat skills with melee as main
No matter the way a melee pure trains, one third (1/3) of experience is also added to hitpoint experience. According to the table mentioned, Attack, Strength and Defense level carries ratio of 13:13:10. Ironically, training two of the skills including defense causes lower combat level then excluding defense, meaning a strength pure has more combat level than other melee pures. Attack and defense should be chosen for wielding rune weapons and armors.

Combat skills with ranged as main
No matter the way a ranged pure trains, one third (1/3) of experience is also added to hitpoint experience unless longrange is selected as attack style. Defense is an independent factor but Attack and strength are not. This gives rise of Ranged-2h hybrids because of unchanged combat level. To decrease the hitpoint though, Vampire slayer must be completed to save attack experience. It is not recommended to train with longrange style because experience will be wasted to defense, which is easier to be accidentally trained than hitpoint and combat level is wasted.

Effect of prayer
Prayer carries 1/8 bonus of combat level. Attaining 43 prayer for all protection prayers causes increase of 5.25 combat levels. Prayer is the least important stat involving both hitpoint and combat level as it carries the lowest ratio in combat level, and training prayer doesn't train hitpoint as well. The saved combat level can be used for training prayer, as it can be surprising to opponents.

Curse spells
To train magic without training hitpoint, the best way is to repeatedly cast curse spells, which can give magic experience only. The spells Confuse, Weaken, Curse can be cast at minimum level 3, 11, 19 respectively, giving experience of 13, 20.5, 29 XP respectively. The best place to train curse spells is at Lumbridge combat hall, in which the magic dummies are capable to be multi-casted.

Failed combat spells
Another way to train magic without training hitpoint is casting splashed combat spells. Strike spells, as the weakest kind of the missile, hit very low and have low cost. Earth strike or fire strike can be used for this purpose, and wearing full metal armor is essential for splashing, except attacking the magic dummies, which gives only 0.1 hitpoint XP per damage dealt.

Quests
This quest gives experience capable to raise magic level from 1 to 4, making cursed spells training available without having to use missile spells to train first.
 * Witch's Potion

Earth strike costs coins each attack if Staff of earth is used, yielding 6.5 experience and maximum of 6 damage, fire strike costs coins each attack if Staff of fire is used, yielding 35 experience and maximum of 8 damage. 4825 attack experience is given upon completion of quest, which is vital for decreasing hitpoint level for getting 40 attack faster. This quest is only available for melee pures training some of defense and strength. The defense level must be lower than 33 in order to attain minimum defense level of 40 after the quest. This quest yields 18650 strength and defense experience upon completion of quest.
 * Vampire Slayer
 * Dragon Slayer

Antique lamps and one-use lamps
Jobs can be taken from the tutors, for every 15 jobs finished, 1 antique lamp is awarded giving XP equal to 25 times the current level of particular skill. By theory, if all resources are bought from Grand exchange, it takes 2.5 playing hours to receive a single lamp. Please notice a minimum level of 20 (4470 experience) of of particular skill is needed to use the lamp.

One-use lamps include Lumbridge and Draynor Diary lamps, giving 500, 1000, 1500 XP for beginner, easy and medium diaries, which the last one can only be attained with 31 magic; Misthalin Training Centre of Excellence gives 2 lamps with 500 XP each; holiday event lamp/experience awards, which is discontinued for F2P players; 2 lamps from Sir Vant after Learning the Ropes is completed, giving 250 XP each.

Varrock dummies
They provide attack experience until level 8, and doesn't give any hitpoint experience.

Non-pures with higher hitpoint
The topic sentence Non-pures with higher hitpoint is defined based on combat level, not on the actual ability to train in long term.What the topic sentence means is that how to make hitpoint level high while combat level is low, as a non-pure. This is a common combination because hitpoint experience in long term cannot exceed 1.5 times of any combat skill, assumed all skills are trained at equal rate and magic attacks yield half hitpoint experience compared to other skills.

Quests
To tackle quests with combat experience as award, the skills which the quest reward offers should be temporarily abandoned.

Alignment of combat skills
Referring to the previously mentioned table: Though nearly always the actual combat level is lower as results have undergone integer arithmetic. From the rewritten formulas, it is found that respective levels of Attack plus strength, Range and Magic should be in ratio of 3:2:2, while defense and prayer are kept at very low level. The level difference of attack and strength should be as large as possible, to provide maximum experience in lowest level available. Prayer and defense should also be kept as low as possible, prayer would sacrifice only 5 levels even at level 43, the requirement for Protect from melee but 40 defense would sacrifice 10 combat levels. Defense should instead be trained to either level 5 or 10 for wearing steel or black equipments.

In this combination of data, the approximate HP level can be estimated. Hitpoint experience is similar to the sum of 1/3 of total of Attack, Strength, Defense, Ranged experience, and 1/6 of magic experience. The Experience table is available for estimation of hitpoint level.

Usage of spells
To attain higher hitpoint, non-pures can cast strike spells to NPCs with very large hitpoint supply, like lesser demons. Avoid usage of curse spells.